what is cobalt ele.configuration is 2,8,8,8,1 but cobalt is in 4th period so it must have 4 shells but its has 5 shells. Is the cobalt ele.configuration is 2,8,8,8,1 ? If it is worng why it is.

Asked by P VISHNU | 13th Aug, 2015, 10:01: PM

Expert Answer:

Element

Symbol

Atomic Number

Electronic Configuration

Valence electrons

Cobalt

Co

27

2, 8, 15, 2

[Ar] 3d7 4s2

 

Thus the electronic configuration of Cobalt is 2, 8, 15, 2.

Answered by Vaibhav Chavan | 14th Aug, 2015, 09:09: AM