Atomic Makeup Isotopes Worksheet
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3
4Work Session: Atomic Makeup, Isotopes, Periodic Table
1.
Complete the chart:
Isotope Symbol
Atomic Number
Mass Number
# of Protons
# of Neutrons
208
Pb
82
210
Pb
82
3
7
17
20
9
10
14
6
12
25
12
12
235
143
2.
Define the following terms.
atomic mass
atomic mass unit (amu)
atomic symbol
atomic number
mass number
isotope
107
109
3.
Silver has two isotopes.
Ag has an isotopic mass of 106.9051 amu, and an abundance of 51.84%.
Ag has an isotopic
47
47
mass of 108.9047, and an abundance of 48.16%. What is the atomic mass of silver? Use significant digits correctly in
questions 3 and 4.
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