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WorksheetsCH 4 Homework
Total questions: 14
Worksheet time: 7mins
Name
Class
Date
1.
What is an atom that has a different number of neutrons than other atoms of the same element?
a)
ion
b)
electron
c)
isotope
d)
molecule
2.
What are counted in an atom to determine mass number?
a)
neutrons
b)
protons and neutrons
c)
protons and electrons
d)
electrons
3.
What is the atomic number of an element?
a)
the number of protons and neutrons
b)
the number of valence electrons
c)
the number of neutrons
d)
the number of protons
4.
What does the "2" mean in the formula for water H2O?
a)
two molecules of water
b)
two molecules of hydrogen
c)
two atoms of hydrogen
d)
two atoms of oxygen
5.
Two types of chemical bonds are ___.
a)
positive and negative
b)
ionic and coavalent
c)
atomic and coavalent
d)
ionic and coefficient
6.
The two most common elements in Earth's crust are ___.
a)
nitrogen and carbon
b)
carbon and oxygen
c)
silicon and oxygen
d)
nitrogen and oxygen
7.
What is a compound?
a)
a substance made of physically bound atoms of two or more different elements
b)
a substance made of chemically bound atoms of two or more different elements
c)
any substance made of subatomic particles fused together
d)
two or more elements magnetically bound
8.
How do atoms form chemical bonds?
a)
by sharing or transferring electrons
b)
by mixing chemical solutions
c)
by sharing or transferring neutrons
d)
through magnetism
9.
What is true of an atom with 8 valence electrons?
a)
It is reactive.
b)
It is missing some electrons.
c)
It is stable.
d)
It has more electrons than it needs.
10.
How many protons does Calcium have?
a)
40
b)
20
c)
60
d)
100
11.
How many neutrons does Potassium have?
a)
19
b)
20
c)
39
d)
89
12.
What is the missing number in each blank of the following equation: CH4 + ___O2 > CO2 + ___H2O
a)
2
b)
3
c)
4
d)
5
13.
Sodium Chloride is an example of ____ bonding.
a)
ionic
b)
covalent
14.
Water is an example of _____ bonding.
a)
ionic
b)
covalent
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