The element with the ground state electron configuration of 1s2 2s2 2p6 3s2 3p5 is
A. Ar.
B. Cl.
C. S.
D. Br.
Answer:B
The element with the ground state electron configuration of 1s2 2s2 2p6 3s2 3p5 is
A. Ar. B. Cl. C. S. D. Br.