Question

Which is the electron configuration of an atom in the ground state?

A) 1s22s12p2
B) 1s22s22p53s2
C) 1s22s23s1
D) ls22s22p63s1

Answer 1

that answer is D..............

Answer 2

D) 1s22s22p63s1 is the correct answer.

As we all know, there are no more than 2 electrons in the s-orbital, no more than 6 electrons in the p-orbital. In order to move to another orbital, you have to fully fill electrons in one orbital, then move to the next one.

Hope this helps~