Chemistry MC: March 2018

Archive for March 2018

A _________ is a particle of electromagnetic radiation having zero mass and carrying a quantum of energy.

A _________ is a particle of electromagnetic radiation having zero mass and carrying a quantum of energy. A. spectrum B. Planck's constant C....

_______ describes mathematically the wave properties of electrons and other very small particles.

_______ describes mathematically the wave properties of electrons and other very small particles. A. Newtonian mechanics B. Quantum theory C....

_______ is the distance between corresponding points on adjacent waves.

_______ is the distance between corresponding points on adjacent waves. A. frequency B. amplitude C. wavelength D. hertz Answer: ...

This scientist is credited with first proposing a dual wave-particle nature for the electron?

This scientist is credited with first proposing a dual wave-particle nature for the electron? A. Schrodinger B. Rutherford C. Einstein D. DeBroglie Answer:...

Neutrons were discovered by ________.

Neutrons were discovered by ________. A. Thomson B. Chadwick C. Rutherford D. Goldstein Answer: ...

The nucleus of an atom was discovered by ____________.

The nucleus of an atom was discovered by ____________. A. Thomson B. Chadwick C. Rutherford D. Goldstein Answer: ...

_______ first proposed the plum-pudding model of the atom.

_______ first proposed the plum-pudding model of the atom. A. Thomson B. Dalton C. Milikan D. Rutherford Answer: ...

English physicist JJ Thomson discovered the ___________.

English physicist JJ Thomson discovered the ___________. A. proton B. electron C. nucleus D. neutron Answer: ...

The first person to measure the charge of an electron was ___________.

The first person to measure the charge of an electron was ___________. A. Milikan B. Thomson C. Rutherford D. Einsten Answer: ...

_______ refers to the closeness of measurements to the correct or accepted value of the quantity measured.

_______ refers to the closeness of measurements to the correct or accepted value of the quantity measured. A. precision B. accuracy C. sharpness D....

________ is the amount of space occupied by an object.

________ is the amount of space occupied by an object. A. mass B. density C. volume D. pressure Answer: ...

The lowest energy state of an atom is its ____________.

The lowest energy state of an atom is its ____________. A. excited state B. based condition C. line-emission D. ground state Answer:...

Atoms of the same element with different masses are called __________.

Atoms of the same element with different masses are called __________. A. periods B. Isotopes C. sister elements D. atomic siblings Answer:...

The atomic number of an element is the number of _________ in each atom of that element.

The atomic number of an element is the number of _________ in each atom of that element. A. protons B. neutrons C. electrons D. orbitals Answer:...

The scientist's atomic theory was a starting point for many later discoveries about the atom.

The scientist's atomic theory was a starting point for many later discoveries about the atom. A. Milikan B. Thomson C. Rutherford D. Dalton Answer:...

The law of _______________ states that if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers.

The law of _______________ states that if two or more different compounds are composed of the same two elements, then the ratio of the masses of the...

The substances formed by a chemical reaction are called _______________.

The substances formed by a chemical reaction are called _______________. A. reactants B. chemical waste C. solids D. products Answer:...

A ____________ property relates to a substance's ability to undergo changes that transform it into different substances.

A ____________ property relates to a substance's ability to undergo changes that transform it into different substances. A. chemical B. physical C....

A solid has a definite shape and ________

A solid has a definite shape and ________ A. color B. volume C. crystalline structure D. price per ounce Answer: ...

A(n)_____ is the smallest unit of an element that maintains that chemical identity of that element.

A(n)_____ is the smallest unit of an element that maintains that chemical identity of that element. A. compound B. proton C. quark D. atom Answer:...

Matter is _______________.

Matter is _______________. A. anything that is important B. everything ever discovered by science C. anything that has mass and takes up space D....

A ______ of energy is the minimum quantity of energy that can be lost or gained by an atom.

A ______ of energy is the minimum quantity of energy that can be lost or gained by an atom. A. photon B. spectrum C. hertz D. quantum Answer:...

The Group 18 elements are called the

The Group 18 elements are called the A. halogens B. noble gases C. alkali metals D. last group Answer: ...

The _____ effect refers to the emission of electrons from a metal when light shines on the metal.

The _____ effect refers to the emission of electrons from a metal when light shines on the metal. A. quantum B. spectral C. wave-like D. photoelectric Answer:...

A _______ is a particle of electromagnetic radiation having zero mass and carrying a quantum of energy.

A _______ is a particle of electromagnetic radiation having zero mass and carrying a quantum of energy. a. spectrum b. Planck's constant c....

The lowest energy state of an atom its ______ state.

The lowest energy state of an atom its ______ state. a. ground b. excited c. zero d. base Answer: ...

_______ describes mathematically the wave properties of electrons and other very small particles.

_______ describes mathematically the wave properties of electrons and other very small particles. a. newtonian mechanics b. quantum theory c....

_______ is the distance between corresponding points on adjacent waves.

_______ is the distance between corresponding points on adjacent waves. A. frequency B. amplitude C. wavelength D. hertz Answer:...

What is the speed of light?

What is the speed of light? A. 3 • 10^6 B. 3.00 •10^8 m/s1 C. 6.022 • 10^23 cm/s D. 2.11 • 10^11 m/s Answer: ...

This scientist is credited with first proposing a dual wave-particle nature for the electron?

This scientist is credited with first proposing a dual wave-particle nature for the electron? A. Schrodinger B. Rutherford C. Einstein D. DeBroglie Answer:...

D-block elements are __________.

D-block elements are __________. A. nonmetals B. metalloids C. both metals and nonmetals D. metals Answer: ...

Which of the following elements has the largest atomic radius?

Which of the following elements has the largest atomic radius? A. hydrogen B. chlorine C. francium D. bismuth Answer: ...

Second ionization energies are ___than first ionization energies.

Second ionization energies are ___than first ionization energies. A. lower B. the same C. higher D. sometimes lower, sometimes higher Answer:...

A positively charged ion is called a ________?

A positively charged ion is called a ________? A. cation B. anoin C. plusion D. positron Answer: ...

The energy change that occurs when an electron is acquired by a neutral atom is called the atom's

The energy change that occurs when an electron is acquired by a neutral atom is called the atom's A. ionization energy B. electronegativity C....

The electronegativities of f-block elements

The electronegativities of f-block elements A. are similar B. vary widely C. are exactly the same D. equal zero Answer: ...

______ electrons are available to be lost, gained, or shared in the formation of chemical compounds.

______ electrons are available to be lost, gained, or shared in the formation of chemical compounds. A. Core B. Valence C. Ionic D. Electronegative Answer:...

_____ may be defined as one-half the distance between the nuclei of identical atoms that are bonded together.

_____ may be defined as one-half the distance between the nuclei of identical atoms that are bonded together. A. Electron affinity B. electronegativity C....

The elements in Group 1 are known as the _____?

The elements in Group 1 are known as the _____? A. alkaline-earth metals B. alkali metals C. halogens D. lanthanides Answer: ...

Which group of elements is designated as the halogens?

Which group of elements is designated as the halogens? A. Group 1 B. Group 2 C. Group 13 D. Group 17 Answer: ...

What name is sometimes used to refer to the entire set of d-block elements?

What name is sometimes used to refer to the entire set of d-block elements? A. transition elements B. representative elements C. inner transition...

The first periodic table was published by ______.

The first periodic table was published by ______. A. Cannizzaro B. Rutherford C. Moseley D. Mendeleev Answer: ...

Which of the following elements has the highest electronegativity?

Which of the following elements has the highest electronegativity? A. oxygen B. hydrogen C. fluorine D. carbon Answer: ...

In the modern periodic table, elements are arranged according to_____.

In the modern periodic table, elements are arranged according to_____. A. decreasing atomic mass B. Mendeleev's original model C. increasing...

Covalent molecular crystals have very low melting points, while covalent network crystals have a very high melting point because

Covalent molecular crystals have very low melting points, while covalent network crystals have a very high melting point because A. the forces...

Water has an unusually high molar enthalpy of vaporization because of its ___________.

Water has an unusually high molar enthalpy of vaporization because of its ___________. A. covalent nature B. hydrogen bonding C. ionic interactions D....

If a gas and a liquid are at the same temperature and pressure, diffusion occurs much faster in the gas because ________________.

If a gas and a liquid are at the same temperature and pressure, diffusion occurs much faster in the gas because ________________. A. there...

Under which conditions does a real gas behave very much like an ideal gas?

Under which conditions does a real gas behave very much like an ideal gas? A. high temperature and low pressure B. high temperature and high...

The __________ of a substance indicates the temperature and pressure conditions at which the solid, liquid, and vapor of a substance can coexist at equilibrium.

The __________ of a substance indicates the temperature and pressure conditions at which the solid, liquid, and vapor of a substance can coexist at...