Question

Write the molecular formulae of the compounds of the following elements with hydrogen by referring to the Mendeleev’s periodic table.

C, S, Br, As, F, O, N, Cl

Answer 1

Elements	Compounds (with hydrogen)
C	CH4 Methane
S	H2S Hydrogen sulphide
Br	HBr Hydrogen bromide
As	AsH3 Arsine
F	HF Hydrogen fluoride
O	H2O Water
N	NH3 Ammonia
Cl	HCl Hydrogen chloride