Question

Write the sub-shell electronic configuration of following elements. Predict the block, group and period. (Symbols are not real) 

a. M – 27 

b. N – 19 

c. P – 15

Answer 1

a. 1s² , 2s² , 2p⁶ , 3s² , 3p⁶ , 3d⁷ , 4s²

block – d; group – 9; period – 4. 

b. 1s² , 2s² , 2p⁶ , 3s² , 3p⁶ , 4s¹ 

block – s; group – 1; period – 4

C. 1s² , 2s² , 2p⁶ , 3s² , 3p³

block – p; group – 15; period – 3