2.4 grams of methane at STP occupies……litres

Each carbon atom, ${\mathrm{C}}_6^{12}$ contains….6 protons, 6 electrons and 6 neutrons ;

Each hydrogen atom, ${\mathrm{H}}_1^1$ contains….1 proton, 1 electron and zero neutrons ;

Thus each molecule of CH₄ contains…10 protons, 10 electrons and 6 neutrons ;

Thus each mole (16 g) of CH₄  contains…10 moles (10 N_A) of protons, 10 moles (10 N_A)  of electrons and 6 moles (6 N_A)  of neutrons ;

Each molecule of CH₄ contains……4 sigma bonds ;

Each mole of CH₄ (16 g) contains……4 moles (4 N_A) sigma bonds ;

Each mole of CH₄ occupies….22.4 litres at STP ;

Each mole of CH₄ contains……One mole ( N_A)  of methane molecules ;

Each mole of CH₄ contains….1 gram atom ( N_A) or 1 mole atom  ( N_A) or 1 mole ( N_A)  of carbon ;

Each mole of CH₄ contains….4 gram atoms (4 N_A) or 4 mole atoms (4 N_A)  of hydrogen ;