Name:________________________ Period:______
Protons, Neutrons, and Electrons Practice
Worksheet
Atomic
symbol
Atomic
number
Protons
B
Neutrons Electrons
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
Solutions for the Protons, Neutrons, and Electrons Practice Worksheet:
Atomic
symbol
Atomic
number
Protons
B
Na
Ga
Y
Cu
Tc
Pb
Yb
Ac
Mo
Tl
Fm
No
Tm
Sg
Ne
K
He
Ti
Fe
Be
S
V
5
11
31
39
29
43
82
70
89
42
81
100
102
69
106
10
19
2
22
26
4
16
23
5
11
31
39
29
43
82
70
89
42
81
100
102
69
106
10
19
2
22
26
4
16
23
Neutrons Electrons
6
13
37
50
35
57
125
102
136
53
125
159
159
101
159
12
20
2
27
30
5
16
28
5
11
31
39
29
43
82
70
89
42
81
100
102
69
106
10
19
2
22
26
4
16
23
mass #
Atomic
Mass
11
24
68
89
64
100
207
172
225
95
206
259
261
170
265
22
39
4
49
56
9
32
51
10.8
23.0
69.7
88.9
63.5
(98)
207
173
227
95.9
204.4
257
259
169
263
20.2
39.1
4.00
47.9
55.8
9.01
32.1
50.9