Question

Assertion :Manganese (atomic number 25) has a less favourable electron affinity than its neighbours on either side. Reason: The manganese has stable, $[Ar{]}^{18}3d^{5}4s^2$ electrons configuration.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Manganese has a less favorable electron affinity than it's neighbor on either side because it have stable $[Ar{]}^{8}3d^{5}4s^2$ configuration due to which it have five unpaired electrons, thus having maximum spin mutiplicity.