Question

The atomic number of two elements are given below. 

Si – 14 Ni – 28 

a. Write the subshell electronic configuration of these elements. 

b. Find out the group and period of each element.

Answer 1

a. Si – 1s² 2s² 2p⁶ 3s² 3p² 

Ni – 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁸ 4s² 

b. Si – Period Number – 3, Group number – 14 

Ni – Period Number – 4, Group number – 10