Back to Practicemedium • Past Paper

What is the subshell electronic configuration of Potassium (At. No. 19)?

A1s2 2s2 2p6 3s2 3p6 3d1

B1s2 2s2 2p6 3s2 3p7

C1s2 2s2 2p6 3s2 3p6 4s1

D1s2 2s2 2p6 3s2 3p6 4s2