Write the atomicity of the following: (i) I2 (ii) H2S (iii) HNO3 (iv)

1.	Write the atomicity of the following: (i) I2 (ii) H2S (iii) HNO3 (iv) Na2SO4 (v) S8
Answer» 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.

Write the atomicity of the following: (i) I2 (ii) H2S (iii) HNO3 (iv) Na2SO4 (v) S8

Answer»

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.

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