The electronic structure of four elements A,B,C,D are:
(A)1s²
(B)1s²,2s²,2p²
(C)1s²,2s²,2p⁵
(D)1s²,2s²,2p⁶
The tendency to form electrovalent bond is largest in
A. A
B. D
C. C
D. B