1.

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»

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



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