The electron infinity values of elements. A.B and C are respectively `-135`,`-60`,`-200` and`-348 KJ= mol^(-1)`. The outer electronic configuration of elements B is

Options

A. `3s^(2) 3p^(5)`
B. `3s^(2) 3p^(4)`
C. `3s^(2) 3p^(3)`
D. `3s^(2)3p^(2)`

Answer

c

Explanation

Election affinity of an eement depends on its electron configuration.Elements having stable electron configuration i.e,half filled or completely filled orbital,posses very low electron affinity values since B has lowest electron affinity,its electron configuration is `3s^(2) 3p^(3)`