Question

Write the atomicity of the following: 

(i) I₂ (ii) H₂S (iii) HNO₃ (iv) Na₂SO₄ (v) S₈

Answer 1

Atomicity: The number of atoms constituting a molecule is known as its atomicity. 

i. In I₂ , there are two atoms of iodine constituting a molecule. 

Hence, the atomicity is 2 (diatomic). 

ii. In H₂S, there are two atoms of hydrogen and one atom of Sulphur constituting a molecule of H₂S. Hence, the atomicity is 3 (triatomic). 

iii. In HNO₃ , there are three atoms of oxygen, one atom of nitrogen and one atom of hydrogen sulphur constituting a molecule of HNO₃ . Hence, the atomicity is five. 

iv. In Na₂SO₄ , there are two atoms of sodium, one atom of Sulphur and four atoms of oxygen constituting a molecule of Na₂SO₄ Hence, the atomicity is seven. 

v. In S₈ , there are eight atoms of sulphur constituting a molecule. 

Hence, the atomicity is eight.