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Hydrogen
H
H
Hydrogen
Helium
He
He
Helium
Lithium
Li
Li
Lithium
Beryillium
Be
Be
Beryillium
Boron
B
B
Boron
Carbon
C
C
Carbon
Nitrogen
N
N
Nitrogen
Oxygen
O
Flourine
F
O
Oxygen
F
Flourine
Neon
Ne
Ne
Neon
Sodium
Na
Na
Sodium
Magnesium
Mg
Mg
Magnesium
Aluminum
Al
Al
Aluminum
Silicon
Si
Si
Silicon
Phosphorus
P
P
Phosphorus
Sulfur
S
S
Sulfur
Chlorine
Cl
Cl
Chlorine
Argon
Ar
Ar
Argon
Potassium
K
K
Potassium
Calcium
Ca
Ca
Calcium
Scandium
Sc
Sc
Scandium
Vanadium
V
V
Vanadium
Chromium
Cr
Cr
Chromium
Manganese
Mn
Mn
Manganese
Iron
Fe
Fe
Iron
Nickel
Ni
Ni
Nickel
Cobalt
Co
Co
Cobalt
Copper
Cu
Cu
Copper
Zinc
Zn
Zn
Zinc
Bromine
Br
Br
Bromine
Kyrpton
Kr
Titanium
Ti
Ti
Titanium
Rubidium
Rb
Rb
Rubidium
Strontium
Sr