The electronic structure of four elements A , B , C , D are (a) 1s^2 (b) 1s^2 , 2s^2 2p^2 (c) 1s^2 , 2s^2 2p^5 (d) 1s^2 , 2s^2 2p^6 The tendency to form electrovalent bond is largest in 2s^2 2p^2 (c) 1s^2 2s^2 2p^5 (d) 1s^2 2s^2 2p^6 The tendency to form electrovalent [...]