Atomic Structure and the Periodic Table Activity Answers
Element
Symbol
Element
Name
Atomic
Number
No. of
Protons
Mass
Number
No. of
Neutrons
No. of
Electrons
Electron
Configuration
No. of
Valence
Electrons
Number of
Electron
Shells
Li
Lithium
3
3
7
4
3
2, 1
1
2
Na
Sodium
11
11
23
12
11
2, 8, 1
1
3
Ca
Calcium
20
20
40
20
20
2, 8, 8, 2
2
4
Be
Beryllium
4
4
9
5
4
2, 2
2
2
B
Boron
5
5
11
6
5
2, 3
3
2
Si
Silicon
14
14
28
14
14
2, 8, 4
4
3
N
Nitrogen
7
7
14
7
7
2, 5
5
2
Mg
Magnesium
12
12
24
12
12
2, 8, 2
2
3
He
Helium
2
2
4
2
2
2
2
1
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Atomic Structure and the Periodic Table Activity Answers
K
Potassium
19
19
39
20
19
2, 8, 8, 1
1
4
F
Fluorine
9
9
19
10
9
2, 7
7
2
O
Oxygen
8
8
16
8
8
2, 6
6
2
Al
Aluminium
13
13
27
14
13
2, 8, 3
3
3
C
Carbon
6
6
12
6
6
2, 4
4
2
P
Phosphorus
15
15
31
16
15
2, 8, 5
5
3
S
Sulfur
16
16
32
16
16
2, 8, 6
6
3
Ar
Argon
18
18
40
22
18
2, 8, 8
8
3
Cl
Chlorine
17
17
35
18
17
2, 8, 7
7
3
Ne
Neon
10
10
20
10
10
2, 8
8
2
H
Hydrogen
1
1
1
0
1
1
1
1
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