Question

Which of the following electron configurations of neutral atoms represent excited states?

( A) [Xe]6s24f1

( B) 2s2

( C) 1s22s22p63s23p63d2

( D) [Ar]4s23d3

(E ) [Kr]5s14d5

Answer 1

The electron configurations that represent excited states are:

(A) [Xe]6s24f1

(D) [Ar]4s23d3

(E) [Kr]5s14d5

Step-by-step explanation:

In these configurations, there is at least one electron in an orbital higher in energy than the ground state configuration. The presence of electrons in these higher energy orbitals indicates that the atom is in an excited state.