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H
hydrogen
Na
sodium
O
oxygen
N
nitrogen
C
carbon
He
helium
Cl
chlorine
Ca
calcium
Sr
strontium
F
fluorine
P
phosphorus
Li
lithium
Kr
krypton
Be
beryllium
Mg
magnesium
Ne
neon
K
potassium
Ba
barium
Cu
copper
Si
silicon