First 20 Elements

HYDROGEN
H
HELIUM
He
LITHIUM
Li
BERYLLIUM
Be
BORON
B
CARBON
C
NITROGEN
N
OXYGEN
O
FLUORINE
F
NEON
Ne
SODIUM
Na
MAGNESIUM
Mg
ALUMINIUM
Al
SILICON
Si
PHOSPHORUS
P
SULPHUR
S
CHLORINE
Cl
ARGON
Ar
POTASSIUM
K
CALCIUM
Ca
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