Question

Write electronic configuration of first 20 elements

Answer 1

hydrogen , helium (He), lithium (Li) , beryllium (Be), boron (B), carbon(C) nitrogen (N) oxygen ( O) fluorine (F) neon (Ne)=2,8 (stable)(noble gas), sodium(Na), magnesium(Mg), aluminium (Al), silicon (Si) , phosphorous(P), sulphur (S) , chlorine (Cl), argon (Ar) , potassium (K), calcium (Ca),

Answer 2

Answer: electronic configuration of first 20 elements

Explanation: