oxygen
helium
hydrogen
I
Cu
radon
Li
calcium
silicon
Be
strontium
Cadmium
K
boron
nitrogen
Cl
phosphorus
Co
barium
xenon
Fe
Sn
platinum
Kr
carbon
argon
cesium
Pu
Pb
aluminum
Zn
arsenic
tungsten
silver
bromine
rubidium
Ti
F
magnesium
chromium
Na
Ne
zirconium
bismuth
mercury
nickel
S
gold
manganese
antimony
U