Question

Which of the following species exhibits the diamagnetic
behaviour ?
(a) NO (b) O₂²⁻ (c) O₂⁺ (d) O₂

Answer 1

O2^2- shows diamagnetic behavior.

Option (B) is correct.

Explanation:

Diamagnetism is defined as:

• It is a quantum mechanical effect that takes place in all materials.
• It is the only contribution to the property of magnetism.
• The material which exhibits this property is called diamagnetic.
• In paramagnetic and ferromagnetic substances, the weak diamagnetic force is overcome by the attractive force of magnetic dipoles in the material.

The electronic configuration of O2^2- is given by:

σ1s^2 σ* 1s^2 σ2s^2 σ*2s^2σ2pz^2 π2px^2 π2py^2 π*2px^2 π*2py

This congfiguration shows that O2^2- exhibits diamagnetic behavior.

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What is paramagnetism?

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