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20 terms

the periodic table of elements

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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