lithium
Li
magnesium
Mg
mercury
Hg
neon
Ne
nickel
Ni
nitrogen
N
Oxygen
O
Phosphrorus
p
Platinum
Pt
Potassium
K
Raidium
Ra
Radon
Rn
Rubidium
Rb
Selenium
Se
Silicon
Si
Silver
Ag
Sodium
Na
Strontium
Sr
Sulfur
S
Tellurium
Te
Tin
Sn
Titanium
Ti
Tungsten
W
Uranium
U