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20 terms

The Periodic Table elements #1-20

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1
H Hydrogen
2
He Helium
3
Li Lithium
4
Be Beryllium
5
B Boron
6
C Carbon
7
N Nitrogen
8
O Oxygen
9
F Fluorine
10
Ne Neon
11
Na Sodium
12
Mg Magnesium
13
Al Aluminum
14
Si Silicon
15
P Phosphorus
16
S Sulfur
17
Cl Chlorine
18
Ar Argon
19
K Potassium
20
Ca Calcium