Name __________________________________________ Date ___________ Block _________
Element
LI
P
Cl
Ni
K
Ag
H
Si
W
Ne
Atomic
Number
3
15
Mass
Number
7
31
35
Protons
Neutrons
Electrons
Charge
17
28
31
39
18
61
1
1
14
110
10
74
14
10
Subatomic Particles Practice
Fill in the blanks in the following sheet for the missing items. Determine the charge of each atom. Circle whether the atom is
If you're having trouble on this worksheet, here are some things you should keep in mind:
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


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Atomic number = number of protons.
Atomic symbol is determined by atomic number (check the periodic table!)
Atomic mass = protons + neutrons
Neutrons = atomic mass – protons
Electrons can't be determined with this information
Atomic Symbol Atomic Number Mass Number Protons
B
Neutrons Electrons
6
11
24
79
29
100
Pb
Cation/Anion
44
Cation/Anion
35
Cation/Anion
43
53
81
206
100
Cation/Anion
37
207
Mo
Cation/Anion
Cation/Anion
11
31
Charge
36
Cation/Anion
78
Cation/Anion
36
Cation/Anion
80
Cation/Anion
159
Cation/Anion
Pt
198
76
Cation/Anion
At
172
86
Cation/Anion
Bohr Models-Go back to the very first chart with neutral atoms. Use the periodic table to determine where the electrons are
located. All of the atoms listed below are considered neutral.
Element
Li
P
Cl
Ni
K
Ag
H
Si
W
Ne
Protons
Electrons Bohr
Model