Chemistry MC: December 2018

Archive for December 2018

How much energy (in kJ) do 3.0 moles of photons all with a wavelength of 655 nm, contain?

How much energy (in kJ) do 3.0 moles of photons all with a wavelength of 655 nm, contain? A) 183 kJ B) 303 kJ C) 394 kJ D) 548 kJ E) 254 kJ Ans...

How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?

How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy? A) 5.67 × 1023 photons B) 2.01 × 1024 photons C)...

How many photons are contained in a burst of yellow light (589 nm) from a sodium lamp that contains 609 kJ of energy?

How many photons are contained in a burst of yellow light (589 nm) from a sodium lamp that contains 609 kJ of energy? A) 3.37 × 1019 photons B) 3.06...

Calculate the energy of the violet light emitted by a hydrogen atom with a wavelength of 410.1 nm.

Calculate the energy of the violet light emitted by a hydrogen atom with a wavelength of 410.1 nm. A) 4.85 × 10-19 J B) 2.06 × 10-19 J C) 1.23 × 10-19...

Calculate the energy of the red light emitted by a neon atom with a wavelength of 703.2 nm.

Calculate the energy of the red light emitted by a neon atom with a wavelength of 703.2 nm. A) 3.54 × 10-19 J B) 4.27 × 10-19 J C) 2.34 × 10-19 J D)...

Which of the following occur as the wavelength of a photon increases?

Which of the following occur as the wavelength of a photon increases? A) the frequency decreases B) the energy increases C) the speed decreases D)...

Which of the following occur as the energy of a photon increases?

Which of the following occur as the energy of a photon increases? A) the frequency decreases. B) the speed increases. C) the wavelength increases D)...

Calculate the frequency of the green light emitted by a hydrogen atom with a wavelength of 486.1 nm.

Calculate the frequency of the green light emitted by a hydrogen atom with a wavelength of 486.1 nm. A) 1.46 × 1014 s-1 B) 6.86 × 1014 s-1 C) 4.33...

Calculate the energy of the orange light emitted per photon, by a neon sign with a frequency of 4.89 × 1014 Hz.

Calculate the energy of the orange light emitted per photon, by a neon sign with a frequency of 4.89 × 1014 Hz. A) 3.09 × 10-19 J B) 6.14 × 10-19...

Calculate the energy of the green light emitted per photon, by a mercury lamp with a frequency of 5.49 × 1014 Hz.

Calculate the energy of the green light emitted per photon, by a mercury lamp with a frequency of 5.49 × 1014 Hz. A) 2.75 × 10-19 J B) 3.64 × 10-19...

Calculate the frequency of the red light emitted by a neon sign with a wavelength of 659.9 nm.

Calculate the frequency of the red light emitted by a neon sign with a wavelength of659.9 nm. A) 2.20 × 1014 s-1 B) 1.98 × 1014 s-1 C) 4.55 × 1014...

Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 × 1014 Hz.

Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 × 1014 Hz. A) 229 nm B) 436 nm C) 206 nm D)...

Calculate the wavelength (in nm) of a the red light emitted by a neon sign with a frequency of 4.74 × 1014 Hz.

Calculate the wavelength (in nm) of a the red light emitted by a neon sign with a frequency of 4.74 × 1014 Hz. A) 633 nm B) 158 nm C) 142 nm D) 704...

Which of the following types of electromagnetic radiation has the smallest frequency?

Which of the following types of electromagnetic radiation has the smallest frequency? A) yellow B) blue C) orange D) green E) purple Answer:&nb...

Which of the following types of electromagnetic radiation has the shortest wavelength?

Which of the following types of electromagnetic radiation has the shortest wavelength? A) blue B) violet C) orange D) green E) yellow Answer:&n...

Which of the following visible colors of light has the longest wavelength?

Which of the following visible colors of light has the longest wavelength? A) blue B) green C) yellow D) red E) violet Answer: ...

Which of the following visible colors of light has the largest frequency?

Which of the following visible colors of light has the largest frequency? A) green B) red C) blue D) yellow E) orange Answer: ...

Identify the color that has a wavelength of 460 nm.

Identify the color that has a wavelength of 460 nm. A) blue B) green C) red D) yellow Answer: ...

Identify the color that has a wavelength of 700 nm.

Identify the color that has a wavelength of 700 nm. A) blue B) green C) red D) yellow Answer: ...

Place the following types of electromagnetic radiation in order of decreasing energy. ultraviolet light radio waves microwaves

Place the following types of electromagnetic radiation in order of decreasing energy.ultraviolet light radio waves microwaves A) radio waves >...

Place the following types of electromagnetic radiation in order of increasing frequency. visible light microwaves X-rays

Place the following types of electromagnetic radiation in order of increasing frequency.visible light microwaves X-rays A) microwaves < visible...

Place the following types of electromagnetic radiation in order of increasing wavelength. ultraviolet light gamma rays radio waves

Place the following types of electromagnetic radiation in order of increasing wavelength.ultraviolet light gamma rays radio waves A) gamma rays <...

A hydrogen atom absorbs a photon of UV light and its electrons enter the n =4 energy level. Calculate the change in energy of the atom and the wavelength (in nm) of the photon.

A hydrogen atom absorbs a photon of UV light and its electrons enter the n =4 energy level. Calculate the change in energy of the atom and the wavelength...

Green light has a wavelength of 5200 A. Calculate the energy of one photon of green light.

Green light has a wavelength of 5200 A. Calculate the energy of one photon of green light. Answer: 3.8 x 10^-19 J (E = hc/wavelength...

Infrared radiation from the the sun has a wavelength of 6200 nm. Calculate the energy of one photon of that radiation?

Infrared radiation from the the sun has a wavelength of 6200 nm. Calculate the energy of one photon of that radiation? Answer: between 10^-20...

A radio has a frequency of 8.6 X 10^8 Hz. What is the energy of one photon of this radiation?

A radio has a frequency of 8.6 X 10^8 Hz. What is the energy of one photon of this radiation? Answer: 5.7 x 10^-25 J (E = hv =hc/wavelength...

A cook uses a microwave oven to heat a meal. The wavelength of the radiation is 1.20 cm. What is the energy of one photon of this microwave oven?

A cook uses a microwave oven to heat a meal. The wavelength of the radiation is 1.20 cm. What is the energy of one photon of this microwave oven? Answer: 1.66...

Yellow light has a frequency of 5.2 x 1014 s -1 while red light has a frequency of 4.3 x 1014 s -1 . Which of the following correctly describes the relationship between the wavelength and energy of yellow versus red light?

Yellow light has a frequency of 5.2 x 1014 s -1 while red light has a frequency of 4.3 x 1014 s -1 . Which of the following correctly describes the...

The energy of the electron of a hydrogen atom in the ground (n = 1) state is ___________.

The energy of the electron of a hydrogen atom in the ground (n = 1) state is ___________. (a) -2.18 × 10-18 J (b) +2.18 × 10-18 J (c) -1.64...

What is the wavelength of a neutron (the mass of a neutron is 1.675 × 10-27 kg) traveling at 100.0 m/s?

What is the wavelength of a neutron (the mass of a neutron is 1.675 × 10-27 kg) traveling at 100.0 m/s? (a) 1.79 × 10-29m (b) 1.32 × 10-15 m (c)...

Which equation represents the electron affinity (E.A.) of the tungsten (W, 74) atom?

Which equation represents the electron affinity (E.A.) of the tungsten (W, 74) atom? (a) W ➞ W+1 + e- (b) W-1 ➞ W + e- (c) W+1 + e- ➞ W-1 +...

Given the information below, what is the average valence electron energy for the oxygen atom (O, 8)? Ionization Energies (in unites of MJ/mol) Element 1s 2s 2p O 52.6 3.12 1.31

Given the information below, what is the average valence electron energy for the oxygen atom (O, 8)? Ionization Energies (in unites of MJ/mol) Element...

Which of the following atoms or ions is the smallest?

Which of the following atoms or ions is the smallest? (a) O2- (8) (b) Na (11) (c) Na+ (d) Mg (12) (e) Mg2+ Answer: (e) Mg...

Arrange the following four atoms in order from smallest to largest radius: Fluorine (F, 9); Neon (Ne, 10); Sodium (Na, 11); Magnesium (Mg, 12)

Arrange the following four atoms in order from smallest to largest radius: Fluorine (F, 9); Neon (Ne, 10); Sodium (Na, 11); Magnesium (Mg, 12) (a)...

Which of the following atoms contains the most unpaired electrons in its ground state?

Which of the following atoms contains the most unpaired electrons in its ground state? (a) B (5) (b) N (7) (c) Cl (17) (d) Ti (22) (e) Cu (29) Answer: (b)...

Which electron configuration of p orbitals would satisfy Hund's rules?

Which electron configuration of p orbitals would satisfy Hund's rules? (a) ↓ ↓ ↓ (b) ⇅ (c) ⇈ ↑ ↑ (d) ⇵ ↑ ↓ (e) None of these configurations...

What -2 ion can have an electron configuration of 1s2 2s2 2s6 3s1 3p1 ?

What -2 ion can have an electron configuration of 1s2 2s2 2s6 3s1 3p1 ? (a) F (9) (b) Ne (10) (c) Na (11) (d) Mg (12) (e) Al (13) Answer: (b)...

What is the correct electron configuration for the zirconium (Zr, 40) atom?

What is the correct electron configuration for the zirconium (Zr, 40) atom? (a) [Kr] 5s 1 3d3 (b) [Kr] 5s 2 3d2 (c) [Kr] 4d4 (d) [Kr] 5s1 4d3 (e)...

A possible set of quantum numbers for the last electron added to form a gallium atom (Ga, 31) in its lowest energy state is:

A possible set of quantum numbers for the last electron added to form a gallium atom (Ga, 31) in its lowest energy state is: (a) 3, 1, 0, -½ (b)...

The Pauli exclusion principle states that:

The Pauli exclusion principle states that: (a) No two electrons in an atom can have the same spin. (b) No two electrons in an atom can occupy...

In a single atom, what is the maximum number of electrons could have a principal quantum number (n) of 4 and an angular quantum number (l) of 1?

In a single atom, what is the maximum number of electrons could have a principal quantum number (n) of 4 and an angular quantum number (l) of 1? (a)...

Which of the following quantum numbers is used to describe the orientation of an orbital in space?

Which of the following quantum numbers is used to describe the orientation of an orbital in space? (a) The principal quantum number, n (b) The...

Which of the following elements requires the most energy to remove its most tightly held electron (the electron closest to the nucleus): Magnesium (Mg, 12); Aluminum (Al, 13); Silicon (Si, 14); Phosphorus (P, 15); Sulfur (S, 16)

Which of the following elements requires the most energy to remove its most tightly held electron (the electron closest to the nucleus): Magnesium (Mg,...

Which element is represented by the following PES spectrum?

Which element is represented by the following PES spectrum? (a) Sc (21) (b) Ti (22) (c) V (23) (d) Cr (24) (e) Mn (25) Answer: (d) Cr...

An atom in its ground state absorbs two photons: a photon with a wavelength of 102.6 nm and then a photon with a wavelength of 1875 nm. The atom then relaxes back to the ground state by emitting a single photon. What is the wavelength of the emitted photon?

An atom in its ground state absorbs two photons: a photon with a wavelength of 102.6 nm and then a photon with a wavelength of 1875 nm. The atom then...

The first ionization energy of the first six elements in the periodic table is given below. H 1312.0 kJ/mol He 2372.3 Li 520.2 Be 899.4 B 800.6 C 1086.4 Why is the first ionization energy of B smaller than Be?

The first ionization energy of the first six elements in the periodic table is given below. H 1312.0 kJ/mol He 2372.3 Li 520.2 Be 899.4 B 800.6 C 1086.4...

Arrange the following elements in order of increasing first ionization energy: Sulfur (S, 16); Argon (Ar, 18); Calcium (Ca, 20)

Arrange the following elements in order of increasing first ionization energy: Sulfur (S, 16); Argon (Ar, 18); Calcium (Ca, 20) (a) S < Ar...

Which of the following transitions from a hydrogen atom with an electron in the n = 5 state will result in the emission of the longest wavelength of light?

Which of the following transitions from a hydrogen atom with an electron in the n = 5 state will result in the emission of the longest wavelength of...

The line structure of the emission spectrum of the hydrogen atom suggests that:

The line structure of the emission spectrum of the hydrogen atom suggests that: (a) The atom is composed of a small positive nucleus and electrons. (b)...

What is the wavelength, in meters, of light that has a frequency of 2.33 x 1015 s -1 ?

What is the wavelength, in meters, of light that has a frequency of 2.33 x 1015 s -1 ? (a) 6.99 x 1023 m (b) 7.77 x 102 m (c) 7.77 x 106 m (d) 12.9...

If X-rays have a shorter wavelength than ultraviolet light, which of the following statements is true?

If X-rays have a shorter wavelength than ultraviolet light, which of the following statements is true? (a) X-rays have smaller frequencies than...

What is the frequency of radiation of wavelength 810 nm?

What is the frequency of radiation of wavelength 810 nm? Answer: so 810 nanometer = 810 X 10^-9 velocity of light = vel of radiations = 3X10^8 m/s. so...

How many photons are in a 1.20mJ burst of this radiation?

How many photons are in a 1.20mJ burst of this radiation? Answer: (1.210^-3)/6.0210^-19=1.99*10^...

If the 330 nm radiation provides exactly the energy to break an average chemical bond in the skin, estimate the average energy of these bonds in kJ/mol.

If the 330 nm radiation provides exactly the energy to break an average chemical bond in the skin, estimate the average energy of these bonds in kJ/mol. Answer: 3.63x10^5...

One type of sunburn occurs on exposure to UV light of wavelength in the vicinity of 330 nm .What is the energy of a photon of this wavelength?

One type of sunburn occurs on exposure to UV light of wavelength in the vicinity of 330 nm .What is the energy of a photon of this wavelength? Answer: Ephoton...

Which of the following statements concerning experiment and explanation is/are true?

Which of the following statements concerning experiment and explanation is/are true? 1. A law is always given in the form of a mathematical expression. 2....

Which nuclide has the same number of protons as ¹⁴₇N?

Which nuclide has the same number of protons as ¹⁴₇N? A) ¹⁹₉F B) ¹⁵₇N C) ¹⁵₈O D) ³¹₁₅P E) ¹²₆C Answer: B) ¹⁵₇...

The property of a series of repeated measurements that is most directly related to precision is

The property of a series of repeated measurements that is most directly related to precision is A) the number of place holders in each measurement. B)...

An ion is formed

An ion is formed A) by either adding neutrons to or subtracting neutrons from the atom. B) by either adding protons to or subtracting protons from...

Which of the following conclusion regarding Rutherford's gold foil experiment is not consistent with the observations?

Which of the following conclusion regarding Rutherford's gold foil experiment is not consistent with the observations? A) The nucleus occupies a...

A sample that cannot be separated into two or more substance by physical means is

A sample that cannot be separated into two or more substance by physical means is A) a homogeneous mixture. B) a heterogeneous mixture. C) either...

A sample of silicon is burned in oxygen to form silicon dioxide. What mass of oxygen is consumed if 57.76 g silicon dioxide is formed from 27.00 g silicon?

A sample of silicon is burned in oxygen to form silicon dioxide. What mass of oxygen is consumed if 57.76 g silicon dioxide is formed from 27.00 g silicon? A)...

6.7 kilogram(s) contains this many grams:

6.7 kilogram(s) contains this many grams: A) 6.7 × 10⁻³ B) 6.7 × 10³ C) 0.67 D) 6.7 × 10² E) 67 Answer: B) 6.7 × 1...

How many oxygen atoms are there in a formula unit of UO₂(C₂H₃O₂)₂ • NH₄C₂H₃O₂ • 4H₂O?

How many oxygen atoms are there in a formula unit of UO₂(C₂H₃O₂)₂ • NH₄C₂H₃O₂ • 4H₂O? A) 12 B) 4 C) 10 D) 8 E) 21 Answer: A) ...

Cathode rays are

Cathode rays are A) anions. B) electrons. C) cations. D) protons. E) positrons. Answer: B) electron...

Neon has three naturally occurring isotopes. The abundance of ²⁰Ne is 90.48% and ²²Ne is 9.25%. What is the percent abundance of ²¹Ne?

Neon has three naturally occurring isotopes. The abundance of ²⁰Ne is 90.48% and ²²Ne is 9.25%. What is the percent abundance of ²¹Ne? A) 49.9% B)...

According to the law of multiple proportions:

According to the law of multiple proportions: A) if the same two elements form two difference compounds, they do so in a the same ratio. B) it is...

The average speed of oxygen molecules at 690°C is 1.60 × 10⁵ cm/s. Which of the following calculations would convert this speed to units of miles per hour?

The average speed of oxygen molecules at 690°C is 1.60 × 10⁵ cm/s. Which of the following calculations would convert this speed to units of miles per...

Choose the group containing the most reactive nonmetals.

Choose the group containing the most reactive nonmetals. A) Group 8A B) Group 3A C) Group 1A D) Group 5A E) Group 7A Answer: E) Group ...

What is the volume of a cube that has an edge length of 0.019 m?

What is the volume of a cube that has an edge length of 0.019 m? A) 6.9 cm³ B) 6.9 × 10⁻³ cm³ C) 6.9 × 10⁻³ m³ D) 6.9 × 10⁻³ km³ E) 6.9 × 10⁻³ mm³ Answer:...

In a particular mass of KAu(CN)₂, there are 8.87×10²⁰ atoms of gold. What is the total number of atoms in this sample?

In a particular mass of KAu(CN)₂, there are 8.87×10²⁰ atoms of gold. What is the total number of atoms in this sample? A) 2.66 × 10²¹ B) 1.77 × 10²¹ C)...

A species that is formed when a molecule gains or loses an electron is called

A species that is formed when a molecule gains or loses an electron is called A) an ion. B) an atom. C) an isotope. D) a metalloid. E) a metal Answer:...

Which of the following statement concerning the SI system is/are correct?

Which of the following statement concerning the SI system is/are correct? 1. Prefixes are used to indicate a power of ten multiplier for a given SI...

A 4.06 cm³ sample sodium metal has a a density of 0.968 g/cm³. What volume does this sample of sodium occupy in its liquid state? The density of liquid sodium is 0.927 g/cm³.

A 4.06 cm³ sample sodium metal has a a density of 0.968 g/cm³. What volume does this sample of sodium occupy in its liquid state? The density of liquid...

How many molecules of phosphoric acid (H3PO4) react with excess calcium carbonate (CaCO3) to produce 25.0 g of Ca3(PO4)2?

How many molecules of phosphoric acid (H3PO4) react with excess calcium carbonate (CaCO3) to produce 25.0 g of Ca3(PO4)2? Answer: 9.72x10 to...

An organic compound methyl acrylate consists of 65.80% C, 37.17% O, and the rest Hydrogen (7.03%). If the molar mass of methyl acrylate is 86.1 g what are its empirical and molecular formulas?

An organic compound methyl acrylate consists of 65.80% C, 37.17% O, and the rest Hydrogen (7.03%). If the molar mass of methyl acrylate is 86.1 g what...

How many moles of Caffeine are in a 10g sample?(Hint: 194.2=1 mol).

How many moles of Caffeine are in a 10g sample?(Hint: 194.2=1 mol). Answer: 0.05 mol in 10g sampl...

Calculate he molar mass of Caffeine (C8H10N4O2).

Calculate he molar mass of Caffeine (C8H10N4O2). Answer: 194.2 ...

A 3.0 mol sample of KClO3 was decomposed according to the equation 2KClO3 (s)-> 2KCl (s) + 3O2. How many moles of O2 are formed assuming 100% yield.

A 3.0 mol sample of KClO3 was decomposed according to the equation 2KClO3 (s)-> 2KCl (s) + 3O2. How many moles of O2 are formed assuming 100% yield. Answer: 4.5...

Which represents the greatest number of atoms?

Which represents the greatest number of atoms? 1) 50.0 g of Al 2) 50.0 g of Cu 3) 50.0 g of Zn 4) 50.0 g of Fe 5) None of the Above Answer: 1)...

Consider the equation 2A + B -> A2B If you react 1.0 mol of A with 1.0 mil of B, how much A2B can be produced?

Consider the equation 2A + B -> A2BIf you react 1.0 mol of A with 1.0 mil of B, how much A2B can be produced? Answer: 0.50 mo...

The empirical formula of styrene is CH; its molar mass is 104.1g/ mol. What is the molecular formula of styrene?

The empirical formula of styrene is CH; its molar mass is 104.1g/ mol. What is the molecular formula of styrene? Answer: C8H...

What is the mass of one mole of copper in grams?

What is the mass of one mole of copper in grams? Answer: 63.5 ...

The _____ equation contains all ions and substances that are in a reaction in aqueous solution.

The _____ equation contains all ions and substances that are in a reaction in aqueous solution. Answer: Complete Ioni...

When a precipitate reaction occurs the ions that do not form the precipitate

When a precipitate reaction occurs the ions that do not form the precipitate 1) evaporate 2)are cations only 3) form insoluble solution 4) left to...

The spectator ion in the reaction Zn(NO3)2+2NH4OH -> 2NH4NO3 + Zn(OH)2 are:

The spectator ion in the reaction Zn(NO3)2+2NH4OH -> 2NH4NO3 + Zn(OH)2 are: Answer: NH4 and NO...

Based on the activity series the reaction that is most likely to occur from among the following is:

Based on the activity series the reaction that is most likely to occur from among the following is: 1) Ni+ BaNO3 2) Cu + HNO3 3) Pb + Na2SO4 4) Mg...

The most common factors that cause chemical reactions to occur are all the following except:

The most common factors that cause chemical reactions to occur are all the following except: 1) Formation of a solid 2) formation of a gas 3) formation...

In an oxidation reduction reaction:

In an oxidation reduction reaction: Answer: The reactants are usually a metal and a nonmeta...

In a precipitation reaction:

In a precipitation reaction: Answer: The reactants are generally two ionic compounds in aqueous solutio...

Identify the solid that forms when the following aqueous solutions are mixed: KNO3 (aq) + BaCl2 (aq)->

Identify the solid that forms when the following aqueous solutions are mixed: KNO3 (aq) + BaCl2 (aq)-> Answer: None Form...

Aqueous solutions of barium chloride and silver nitrate are mixed to form solid silver chloride and aqueous barium nitrates. The balanced complete ionic equation contains which correct coefficient and ion.

Aqueous solutions of barium chloride and silver nitrate are mixed to form solid silver chloride and aqueous barium nitrates. The balanced complete ionic...

You have exposed electrodes of a lightbulb in a solution of H2SO4 so that the lightbulb is on. You add a dilute solution and the bulb goes dim. Which did you add?

You have exposed electrodes of a lightbulb in a solution of H2SO4 so that the lightbulb is on. You add a dilute solution and the bulb goes dim. Which...

Which of the following compounds is soluble in water?

Which of the following compounds is soluble in water? 1) Fe(OH)2 2) Mg3(PO4)2 3) Sr(SO4)2 4) Na2CO3 5) PbCl2 Answer: 4) Na2CO...

Write the formula for Sodium Chloride

Write the formula for Sodium Chloride Answer: NaC...

Write the formula for Sodium Cyanide

Write the formula for Sodium Cyanide Answer: NaC...

Write the formula for Aluminum Nitrate

Write the formula for Aluminum Nitrate Answer: Al(NO3)...

Write the formula for Aluminum Chloride

Write the formula for Aluminum Chloride Answer: AlCl...

Write the formula for Zinc Chloride

Write the formula for Zinc Chloride Answer: ZnCl...

Write the name for Li2F

Write the name for Li2F Answer: Lithium Fluorid...

Write the name for HgO2

Write the name for HgO2 Answer: Mercury (II) Oxid...

Write the name for HBr

Write the name for HBr Answer: Hydrobromic Aci...

Write the name for CaS

Write the name for CaS Answer: Calcium Sulfid...

Write the name for CCl4

Write the name for CCl4 Answer: Carbon Tetrachlorid...

Write the name for HF

Write the name for HF Answer: Hydrofluoric Aci...

Write the name for PCl5

Write the name for PCl5 Answer: Phosphorous Pentachlorid...

Write the name for Al2O3

Write the name for Al2O3 Answer: Aluminum Oxid...

Write the name for H2SO4

Write the name for H2SO4 Answer: Sulfuric Aci...

Write the name for Ca3(PO4)2

Write the name for Ca3(PO4)2 Answer: Calcium Phosphat...

What is the difference between wavelength and frequency?

What is the difference between wavelength and frequency? Answer: Wave,entry differs from frequency because with a longer wavelength the lower...

Electron Configuration for Fe

Electron Configuration for Fe Answer: [Ar] 4s2 3d...

Electron Configuration for Sc

Electron Configuration for Sc Answer: [Ar] 4s2 3d...

Which of the following properties generally decreases across the periodic table from sodium(Na) to Chlorine (Cl)?

Which of the following properties generally decreases across the periodic table from sodium(Na) to Chlorine (Cl)? Answer: Atomic Radiu...

The fourth principle energy level has:

The fourth principle energy level has: Answer: Sixteen (16) Orbital...

As the wavelength of light decreases, the energy:

As the wavelength of light decreases, the energy: Answer: Increase...

Which have the same outer energy level configurations?

Which have the same outer energy level configurations? 1) H, He 2) N, P, As, Bi 3) Mg, Al, Ca, Ga 4) Li, Be, N, Ne Answer: 2) N, P, As, B...

The distance between two successive peaks or troughs in a wave is called

The distance between two successive peaks or troughs in a wave is called Answer: The wavelengt...

The correct electron configuration for Cu is:

The correct electron configuration for Cu is: Answer: [Ar] 4s1 3d1...

A packet of energy of electromagnetic radiation is called

A packet of energy of electromagnetic radiation is called Answer: Photo...

The lowest possible energy state of an atom is called its ___________ state.

The lowest possible energy state of an atom is called its ___________ state. Answer: Groun...

The energy levels of the hydrogen atom (and all atoms) are _____________, meaning that only certain discrete energy levels are allowed.

The energy levels of the hydrogen atom (and all atoms) are _____________, meaning that only certain discrete energy levels are allowed. Answer:&n...

According to the VSEPR model, the progressive decrease in the bond angles in the series of molecules CH4, NH3, and H2O is best accounted for by the

According to the VSEPR model, the progressive decrease in the bond angles in the series of molecules CH4, NH3, and H2O is best accounted for by the Answer: Increasing...

Which of the following is an incorrect designation for an atomic orbital?

Which of the following is an incorrect designation for an atomic orbital? 1) 1s 2) 3d 3) 6s 4) 4f 5) 1p Answer: 5) 1...

Which of the following elements needs three electrons to complete its valence shell?

Which of the following elements needs three electrons to complete its valence shell? 1) Ba 2)P 3) Si 4) Ca 5) Cl Answer: 2) ...

The maximum number of electrons in the third principal energy level of an atoms is

The maximum number of electrons in the third principal energy level of an atoms is Answer: 1...

Which one of the following atoms has a partly filled D-Sublevel?

Which one of the following atoms has a partly filled D-Sublevel? 1) Ca 2) Ar 3) Zn 4) As 5) Ni Answer: 5) N...

Which of the following atoms has the largest atomic radius?

Which of the following atoms has the largest atomic radius? 1) Na 2) Si 3) Mg 4) C 5) P Answer: 1) N...

Which of the following atoms has the highest ionization energy?

Which of the following atoms has the highest ionization energy? 1) P 2) Mg 3) Si 4) Na 5) Cl Answer: 5) C...

Which statement is incorrect about quantum theory?

Which statement is incorrect about quantum theory? 1) when filling orbitals of equal energy two electrons will occupy the same orbital before filling 2)...

Which molecule has trivial pyramidal geometry?

Which molecule has trivial pyramidal geometry? 1) Co2 2) PH3 3) CH4 4) C2H4 5) H2O Answer: 2) PH...

Which molecule has a double bond?

Which molecule has a double bond? 1) Co2 2) PH3 3) CH4 4) C2H4 5) H2O Answer: 5) H2...

How many electrons are lost or gained to form the following ions? Al 3+

How many electrons are lost or gained to form the following ions? Al 3+ Answer: Lose 3 electron...

How many electrons are lost or gained to form the following ions? P 3-

How many electrons are lost or gained to form the following ions? P 3- Answer: Gain 3 electron...

How many electrons are lost or gained to form the following ions? Pb 2+

How many electrons are lost or gained to form the following ions? Pb 2+ Answer: Lose 2 Electron...

How many protons and electrons? Cl -1

How many protons and electrons? Cl -1 Answer: P= 17. E= 1...

How many protons and electrons? Al 3+

How many protons and electrons? Al 3+ Answer: P= 13. E= 10 ...

How many protons and electrons? P 3-

How many protons and electrons? P 3- Answer: P=15. E=1...

How many protons and electrons? Co 2+

How many protons and electrons? Co 2+ Answer: P= 27. E=2...

Name two elements that have similar properties similar to those of the element chlorine.

Name two elements that have similar properties similar to those of the element chlorine. Answer: Iodine and Fluorine (I & F...

How many sig figs? 3670.03

How many sig figs? 3670.03 Answer: ...

How many sig figs? 78.65

How many sig figs? 78.65 Answer: ...

How many sig figs? 78.00

How many sig figs? 78.00 Answer: ...

How many sig figs? 9400

How many sig figs? 9400 Answer: ...

How many sig figs? 0.056

How many sig figs? 0.056 Answer: ...

How many sig figs? 0.0008

How many sig figs? 0.0008 Answer: ...

How many sig figs? 406

How many sig figs? 406 Answer: ...

How many sig figs? 546.8

How many sig figs? 546.8 Answer: ...

How many sig figs? 4760

How many sig figs? 4760 Answer: ...

How many sig figs? 6700.3

How many sig figs? 6700.3 Answer: ...

The alkaline earth metal that has 18 electrons as a stable ion

The alkaline earth metal that has 18 electrons as a stable ion Answer: C...

The halogen that is also a metalloid

The halogen that is also a metalloid Answer: A...

The transition metal that has 24 electrons as a 3+ ion

The transition metal that has 24 electrons as a 3+ ion Answer: C...

The heaviest naturally occurring noble gas

The heaviest naturally occurring noble gas Answer: R...

The atomic mass of an element is equal to______

The atomic mass of an element is equal to______ Answer: The total mass of the isotopes of that elemen...

Which of the following does not belong to the family or classification indicated?

Which of the following does not belong to the family or classification indicated? 1) Ge, transition metal 2) At, halogen 3) Rn, noble gas 4) Na, alkali...

A species with 12 protons and 10 electrons is

A species with 12 protons and 10 electrons is Answer: Mg 2...

All of the following are characteristics of metals except:

All of the following are characteristics of metals except: 1) conductors of electricity 2) malleable (easy to bend) 3) ductile (can handle impact) 4)...

An isotope, X, of a particular element has an atomic number of 7 and a mass of 15 therefore:

An isotope, X, of a particular element has an atomic number of 7 and a mass of 15 therefore: X is an isotope of nitrogen X has 8 neutrons per atom Answer: X...

Which one of the following statements about structure is false?

Which one of the following statements about structure is false? 1) Electrons occupy a very large volume compared to the nucleus 2) Number of...

Which pair has approximately the same mass?

Which pair has approximately the same mass? A) a hydrogen, H-1, atom, and a deuterium, H-2 atom B) a proton and a neutron Answer: B) a proton...

Which is false:

Which is false: 1) ions are formed by adding electrons to a neutral atom 2) ions are formed by changing the number of protons in an atoms nucleus 3)...

Which atomic particle determines the chemical behavior of an atom?

Which atomic particle determines the chemical behavior of an atom? Answer: Nucleu...

How many protons, electrons, and neutrons does 32 S 16 have?

How many protons, electrons, and neutrons does 32 S 16 have? Answer: 16 Protons 16 Electrons 16 Neutron...

Which statements are true:

Which statements are true: 1) Number of protons in an element is the same for all neutral atoms of that element 2) The number of electrons in an element...

The average mass of boron is 10.81g. Assuming you were able to isolate one boron atom, the chance that you would randomly get one with a mass of 10.81 is:

The average mass of boron is 10.81g. Assuming you were able to isolate one boron atom, the chance that you would randomly get one with a mass of 10.81...