WorksheetsChemistry-11 Reacting masses Preview
Total questions: 12
Worksheet time: 7mins
Name
Class
Date
1.
The Atomic mass of Fe
a)
55
b)
56
c)
54
d)
53
2.
The atomic number of Ar
a)
39
b)
40
c)
22
d)
18
3.
What is the name of the atom pictured here?
a)
Nitrogen
b)
Nitrogen-15
c)
Nitrogen-7
d)
Nitrogen-8
4.
Oxygen has 8 protons. What is oxygen's atomic number?
a)
16
b)
8
c)
15.999
d)
0
5.
What is the correct chemical formula for nitrogen gas?
a)
N2
b)
N3
c)
N1
6.
What is the correct chemical formula for rust?
a)
F2O3
b)
Fe2O3
c)
Fe3O2
7.
Sodium ion has a charge of 1+. How do you write its formula?
a)
Na+
b)
Na+
c)
Na1+
d)
Na1+
8.
What is the formula of magnesium ion?
a)
Mg+
b)
Mg2+
c)
Mg-
d)
Mg2-
9.
What is the formula of calcium hydroxide?
a)
CaOH
b)
CaOH2
c)
Ca(OH)2
d)
Ca2OH
10.
How many valence electrons are in an atom of Ba?
a)
2
b)
8
c)
4
d)
1
11.
Which of the following correctly represents the electronic distribution in the Mg atom? .
a)
3, 8, 1
b)
2, 8, 2
c)
1, 8, 3
d)
8, 2, 2
12.
Which equation is balanced?
a)
PbO2 + 2H2--> H2SO4
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
100 %
