Which of the following configurations represents the most electronegative element?

Options

A. `1s^(2)2s^(2)2p^(6)3s^(1)`
B. `1s^(2)2s^(2)2p^(5)`
C. `1s^(2)2s^(2)2p^(6)3s^(2)3p^(5)`
D. `1s^(2)2s^(2)2p^(4)`

Answer

B

Explanation

Z = 9 is the atomic number of fluorine which is the most electronegative element.