Question

Which of these molecular electron configurations describe an excited state?

Answer 1

We have ground strate configurations of electrons,if electrons are filled in order of increasing energy. When there are electrons are in higher orbitals, we have an atom in an excited state. B, and C are excited states. In B, 2 electrons can fit in the 4s orbital, and that should fill fully before the 4p orbitals. In C, the same is true for 5s and 5p In D, this is not an excited state because 4s fills before 3d

Answer 2

See attachment with this answer

Step-by-step explanation:

Electronic configuration:

Definition:

The electronic configuration is defined as the arrangement of electrons in atomic or molecular orbitals.

Electronic configuration is used for:

The electronic configuration describes the ground state of the orbitals present in an atom or also to describe the ionized state of an atom.

Three principles of electronic configuration:

The electronic configuration is based on three principles Hund's Rule, Aufbau's Principle, and Pauli-exclusion principle.

Excited-state of Atom:

The excited state in an atom is the state in which electron revolving around orbitals have a higher energy state than the ground state.