Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
|
|
|
1.
|
In a
chemical formula, the number of each type of atom in the compound is shown by numbers called
____. a. | superscripts | c. | oxidation
numbers | b. | chemical symbols | d. | subscripts | | | | |
|
|
|
2.
|
A group of
covalently bonded atoms that acts together as one charged atom is a ____. a. | crystal | c. | negative
ion | b. | molecule | d. | polyatomic
ion | | | | |
|
|
|
3.
|
The elements
that make up a compound and the exact number of atoms of each element in a unit of the compound can
be shown in a ____. a. | chemical formula | c. | subscript | b. | chemical symbol | d. | superscript | | | | |
|
|
|
4.
|
A chemical
bond that occurs when atoms share electrons is a(n) ____ bond. a. | covalent | c. | magnetic | b. | ionic | d. | polyatomic | | | | |
|
|
|
5.
|
The ____
tells you how many electrons an atom must gain, lose, or share to become stable. a. | atomic
mass | c. | ionic
number | b. | atomic number | d. | oxidation number | | | | |
|
|
|
6.
|
The sum of
the oxidation numbers in a neutral compound is always ____. a. | a negative
number | c. | a positive
number | b. | one | d. | zero | | | | |
|
|
|
7.
|
The
oxidation number of an atom is shown with a ____. a. | negative number | c. | subscript | b. | positive number | d. | superscript | | | | |
|
|
|
8.
|
Which of the
following correctly shows the formula for a hydrate? a. | H2O | c. | MgSO4(H2O)7 | b. | H2O2 | d. | MgSO4 ´ 7H2O | | | | |
|
|
|
9.
|
How many
electrons are needed in the outer energy levels of most atoms for the atom to be chemically
stable?
|
|
|
10.
|
What kind of
chemical bond is formed when an equal exchange of electrons occurs? a. | covalent | c. | ionic | b. | hydrate | d. | magnetic | | | | |
|
|
|
11.
|
What is the
total number of atoms in the compound Ca(ClO3)2?
|
|
|
12.
|
How many
hydrogen atoms are present in one molecule of ammonium acetate,
NH4C2H3O2?
|
|
|
13.
|
What is the
name of the compound with the formula NaCl? a. | chlorine sodiate | c. | sodium chloride | b. | sodium
chlorate | d. | sodium
dichloride | | | | |
|
|
|
14.
|
Why do the
noble gases NOT form compounds readily? a. | They have empty outer energy levels. | b. | They have no
electrons. | c. | They have seven electrons in the outer energy
levels. | d. | Their outer energy levels are completely filled with
electrons. | | |
|
|
|
15.
|
What is the
number of potassium atoms compared to oxygen atoms in a binary compound made from these two
elements? a. | One potassium atom to
two oxygen atoms. | b. | One potassium atom to three oxygen atoms. | c. | Two potassium atoms to
one oxygen atom. | d. | Three potassium atoms to one oxygen atom. | | |
|
|
|
16.
|
What is the
name of a binary compound made up of lithium and chlorine? a. | chlorine
lithiate | c. | lithium
chloride | b. | chlorine lithium | d. | lithium chlorate | | | | |
|
|
|
17.
|
Which of the
following is the correct formula for magnesium nitrate? a. | MgNO3 | c. | Mg(NO3)2 | b. | Mg2NO3 | d. | Mg2(NO3)2 | | | | |
|
|
|
18.
|
What is the
charge of phosphate in K3PO4?
|
|
|
19.
|
What is the
correct name for K2SO4? a. | potassium disulfide | c. | potassium sulfide | b. | potassium
sulfate | d. | potassium(II)
sulfate | | | | |
|
|
|
20.
|
What is the
correct formula for magnesium oxide?
|