The number of electrons in each of Zinc 's shells is 2 , 8 , 18 , 2 .
Number 's electronic configuration is ( Ar ) 3d10 4s2 .
The number of electrons in each of Zinc 's shells is 2 , 8 , 18 , 2 , and its electronic configuration is ( Ar ) 3d10 4s2 .