Gram molecular mass of Oxygen is 32 g. Density of Oxygen is 1.429 g/litre. Find the gram molar volume of Oxygen.

From the given examples, form the pair of isotopes and the pair of isobars:

₁₈Ar⁴⁰, ₁₇Cl³⁵, ₂₀Ca⁴⁰, ₁₇Cl³⁷

Molecular mass of Nitrogen is 28. Its atomic mass is 14. Find the atomicity of Nitrogen.

‘Cl’ represents Chlorine atom, ‘Cl₂’ represents Chlorine molecule.

List out any two differences between atoms and molecules.

Calculate the gram molecular mass of water from the values of gram atomic mass of Hydrogen and of Oxygen.

Gram atomic mass of Hydrogen = 1 g

Gram atomic mass of Oxygen = 16 g