Which of these is the best way to express the formula HOH?
A) HHO
B) 2HO
C) 2H1O
D) H20
Answer: D) H2O
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Introduction to Chemistry
- Which classification of elements on the periodic table does not combine chemically with other elements?
- Any atom, except hydrogen and helium, is considered chemically stable when there are how many electrons in the outermost shell?
- What type of chemical bond is usually formed between atoms that readily give up electrons and atoms that readily accept electrons?
- Atoms that have become charged from losing or gaining electrons are called ______.
- All of the elements in a vertical column of the periodic table have ______.
- Two or more elements combine chemically to form a _______.
- What happens in a single displacement reaction?
- The quantity of an element that has a weight in grams numerically equal to the element's atomic weight is called _______.
- When the maximum amount of solute that the solvent can dissolve is added, it is called a ______ solution.
- The nucleus of an atom is comprised of ______.
- The notation that expresses the number of electrons involved when an atom reacts chemically is the ______ number.
- What type of chemical bond is formed when electrons are shared between atoms?
- Which classification of elements on the periodic table tends to give up electrons when combining chemically with other elements?
- When a compound is formed, the total of all the valences must equal _____.
- What happens in a decomposition reaction?
- Most water solutions can conduct electricity to varying degrees and are called ______ solutions.
- Which of the following is a correct way to write chemical equations?
- What is the smallest particle of an element that still retains the chemical properties of that element?
- Water will dissolve ionic compounds because____________.
- The properties of a sample of a ______________ mixture depends on the location from which the sample was taken.
- The atoms contained in this type of matter are of two or more kinds
- A mixture of table sugar and water is an example of which type of matter?
- The atoms contained in this type of matter are of the same kind
- Matter that varies in composition and properties describes which classification of matter?