Question

the electron affinity values of elements A,B,C and D respectively -135,-60,-200,-348 Kj/mol.The outer electronic configuration of B is

Answer 1

option c. 3s2 3p3...because here its said B has ea -60 kj. so it must be stable configuration. we know stable configurated atoms does not want other electrons

Answer 2

Answer

Option(d) 3s2 3p2 will be the electronic configuration of B.

Explanation

Electron affinity increases across the periods generally, but exception is at half filled p-orbital which is stable. So, 3s2 3p3 has less Ea among these.

If p- orbital is half filled it will be have highest ionising energy and electron affinity of it will be less

So the outer electronic configuration of element B is 3s2 3p2.

Final answer: optionD-3s2 3p2

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