Question

Write the molecular formula of the compound of the following elements with hydrogen by referring to the Mendeleev periodic table C,S,F,O,N,Cl,Br,As

Answer 1

CH4 methane
H2S hydrogen sulphide
HBr hydrogen bromide/hydrobromic acid
AsH3 arsenic hydride
HF hydrogen fluoride/hydrofluoric acid
H2O dihydrogen oxide (lol, its water)
NH3 ammonia
HCl hydrogen chloride/hydrochloric acid