WorksheetsCHEM: Atomic Structure - Relative Atomic Mass
Total questions: 8
Worksheet time: 8mins
Name
Class
Date
1.
The relative atomic mass is the average mass of an atom compared to
a)
the mass of a carbon-12 atom.
b)
1/12 the mass of a carbon-12 atom
c)
the mass of a hydrogen atom
d)
1/12 the mass of a hydrogen atom
2.
What is the relative molecular mass of fluorine gas, F2?
a)
19
b)
38
c)
9
d)
18
3.
What is the unit of relative molecular mass?
a)
kilogram
b)
gram
c)
gram per mole (g/mol)
d)
no units
4.
The formula of a compound is M(OH)2. Given that the Mr of the compound is 98, calculate the Ar of M.
a)
32
b)
64
c)
81
d)
94
5.
Calcium has three different isotopes. One has a mass of 35.00 amu; another has a mass of 41.00 amu; and another has a mass of 40.00 amu. Which isotope is the most abundant of the three?
a)
40.00 amu
b)
41.00 amu
c)
35.00 amu
d)
impossible to tell
6.
Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?
a)
Nitrogen-13
b)
Nitrogen-14
c)
Nitrogen-15
d)
Based on the information given, it cannot be determined
7.
What is the relative atomic mass (Ar) of Xenon (Xe)?
a)
54
b)
77
c)
131
d)
132
8.
What is the relative atomic mass (Ar) of Xenon (Xe)?
a)
54
b)
77
c)
131
d)
132
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