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Template:Periodic table (period 3)
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t
e
Period 3
in the
periodic table
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Group
→
↓
Period
3
So
dium
11
Na
22.990
Magne
sium
12
Mg
24.305
Alumin
ium
13
Al
26.982
Sili
con
14
Si
28.085
Phos
phorus
15
P
30.974
Sulfur
16
S
32.06
Chlor
ine
17
Cl
35.45
Argon
18
Ar
39.95
Primordial
From decay
Synthetic
Border
shows natural occurrence of the element
s-block
f-block
d-block
p-block
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