Identify the excited state

CHEMISTRY · Single correct · A Level · Chemistry · Atomic structure · Atomic structure

Problem

Identify the excited state, rather than a ground state, in the following electron configurations. (1) [Ne] 3s23p3[\text{Ne}]\,3s^2 3p^3 (2) [Ne] 3s23p34s1[\text{Ne}]\,3s^2 3p^3 4s^1 (3) [Ne] 3s23p64s1[\text{Ne}]\,3s^2 3p^6 4s^1 (4) [Ne] 3s23p63d14s2[\text{Ne}]\,3s^2 3p^6 3d^1 4s^2

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