Periodic Table Explorer
H
1
1
He
2
2
Li
3
3
Be
4
4
B
5
5
C
6
6
N
7
7
O
8
8
F
9
9
Ne
10
10
Na
11
11
Mg
12
12
Al
13
13
Si
14
14
P
15
15
S
16
16
Cl
17
17
Ar
18
18