ATomic...combinations???

Guys...here are some atomic wateva...kk?
H -->hydrogen atom
H2 -->hydrogen molecule
Cl -->chlorine atom
Cl2 -->chlorine molecule
O -->oxygen atom
O2 -->oxygen molecule
H2O -->water molecule
CO2 -->carbon dioxide molecule
N -->nitrogen atom
Hcl -->hydrochloric acid
NH3 -->ammonia
N2 -->Nitrogen molecule
SO2 -->sulphur dioxide molecule
C2H5OH -->ethyl slcohol ethanol --beer
CH4 -->methane gas
Mgo -->magnesium oxide
ZnO -->zinc oxide
FeCl -->iron chloride
NaCl -->sodium chloride
CaO -->calcium oxide
O3 -->ozone

Study properly ah...or else u fail ur patiker!!!

PB