Modern Periodic Law & Periodic Table
Same Group Elements Electronic Configuration
Elements A, B, C, D and E have the following electronic configuration
(A) 1s²2s²2p²
(B) 1s²2s²2p⁶3s²
(C) 1s²2s²2p⁵
(D) 1s²2s²2p⁶3s²3p²
(E) 1s²2s²2p⁶3s²3p⁶
Which of these will belong to the same group in the periodic table ?