PT
H
Hydrogen
Boron
B
Li
Lithlum
Sodium
Na
Mg
Magnesium
Potassium
K
Ca
Calcium
Chromlum
Cr
Fe
Iron
Cobalt
Co
Ni
Nickel
Copper
Cu
Zn
Zinc
He
Helium
C
Carbon
Nitrogen
N
O
Oxygen
Fluorine
F
Ne
Neon
Al
Aluminum
U
Uranium
Californium
Cf
Pt
Platium
Es
Einsteinium
Am
Americium