hydrogen
H
potassium
K
Magnesium
Mg
Calcium
Ca
Barium
Ba
Chromium
Cr
Tungsten
W
Iron
Fe
Cobalt
Co
Nickel
Ni
Copper
Cu
Silver
Ag
Gold
Au
Zinc
Zn
Mercury
Hg
Krypton
Kr
Uranium
U
Lithium
Li
Boron
B
Aluminum
Al
Carbon
C
Silicon
Si
Tin
Sn
Lead
Pb
Nitrogen
N
Phosphorus
P
Oxygen
O
Sulfur
S
Fluorine
F
Chlorine
Cl
Iodine
I
Helium
He
Neon
Ne
Argon
Ar
Radon
Rn