Which have the same outer energy level configurations?
1) H, He
2) N, P, As, Bi
3) Mg, Al, Ca, Ga
4) Li, Be, N, Ne
Answer: 2) N, P, As, Bi
Which have the same outer energy level configurations?
1) H, He
2) N, P, As, Bi
3) Mg, Al, Ca, Ga
4) Li, Be, N, Ne
Answer: 2) N, P, As, Bi