What element has the following last electronic configuration 3d7?

Question

What element has the following last electronic configuration 3d7?

Answer 1

this is its electronic structure

1s2 2s2 2p6 3s2 3p6 4s3 3d7

Number of electrons and protons in neutral state

2+2+6+2+6+2+7=27

Z=27 corresponds to cobalt

Answer 2

Cobalt 27