Practicing Atomic Numbers
Neutral Atoms
Element
Atomic #
8
8
16 O
27
27
59 Co
1
1
1 H
78
78
195 Pt
25
25
54.9 Mn
W
P+N
Mass #
16
59
1
195
55
Name:________________
+
# of Protons
8
27
1
78
25
# of Neutrons
8
32
0
117
30
# of Electrons
8
27
1
78
25
74
92
86
222 Rn
86
10
20 Ne
10
222
107.9
20
39.1
92
86
14
136
86
10
10
10
Ions
(Non-neutral atoms that have lost or gained electrons)
2 types of Ions; 1. Cation (lost electrons and become positive). 2. Anion (Gained Elect.
Become negative)
Element
Atomic #
Mass #
# of Protons
# of Neutrons
# of Electrons
1 +1
1
1
1
0
0
1 H
17 -1
35 Cl
9 -1
19 F
26
17
9
80
35
40
19
26
17
20
9
74
12
23
18
18
10
79
78
52
10
92
143
92
6
35
8
31
6
18
10
82
11
+1
23 Na
ISOTOPES
92
235 U
6
14 C
11
23
11
(different number of Neutrons than the Average!)
92
27
6
235
62
14