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WorksheetsCh 20 Chemical Bonds
Total questions: 12
Worksheet time: 6mins
Name
Class
Date
1.
Which of the following correctly shows the formula for a hydrate?
a)
H2O
b)
H2O2
c)
MgSO4(H2O)7
d)
MgSO4 • 7H2O
2.
What kind of chemical bond is formed when one atom gives electrons to another atom?
a)
magnetic
b)
ionic
c)
hydrate
d)
covalent
3.
What is the total number of atoms in the compound Ca(NO3)2?
a)
2
b)
9
c)
3
d)
5
4.
What is the charge of oxygen in Na2O?
a)
4+
b)
2+
c)
2-
d)
1-
5.
If the elements in a compound are not equally sharing the electrons, the molecule will be ________.
a)
nonpolar
b)
polar
c)
ionic
d)
hydrate
6.
How many nitrogen atoms are present in one molecule of ammonium acetate, NH4C2H3O2?
a)
12
b)
1
c)
7
d)
4
7.
What is the total number of atoms in the compound H2O2?
a)
4
b)
2
c)
1
d)
8
8.
Why do noble gases NOT form compounds readily?
a)
They have empty outer energy levels.
b)
They have 7 electrons in the outer energy levels.
c)
They have no electrons.
d)
The outer energy level is completely filled with electrons.
9.
The sum of the oxidation numbers in a neutral compound is always ___.
a)
one
b)
zero
c)
a negative number
d)
a positive number
10.
The ___ tells you how many electrons an atom must gain, lose, or share to become stable.
a)
atomic mass
b)
atomic number
c)
oxidation number
d)
ionic number
11.
How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?
a)
4
b)
8
c)
18
d)
6
12.
A chemical bond that occurs when atoms share electrons is a(n) _______ bond.
a)
ionic
b)
covalent
c)
polyatomic
d)
magnetic
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