Question

Based on the hints given, find out the atomic number and write down the sub shell electronic configuration of elements (Symbols used are not real). 

i. A – period 3 group 17 

ii. B – period 4 group 6

Answer 1

A₁₇ — 1s² 2s² 2p⁶ 3s² 3p⁵

B₂₄ — 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹