Name:________________________ Period:______
Protons, Neutrons, and Electrons Practice Worksheet
Atomic
symbol
Atomic
number
Protons Neutrons Electrons
B
Mass
Number
6
11
24
31
37
39
89
35
63.5
43
100
207
Pb
102
70
225
Mo
227
53
81
100
206
159
No
Tm
261
170
106
159
19
2
22
39
20.2
2
Ti
49
4
30
5
55.8
16
V
Atomic
Mass
28
32