What is the electron configuration of a selenium atom in an excited state?

Md Ariful Islam

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Md Ariful Islam

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The excited state of an atom occurs when it has absorbed energy. When this happens, an electron can jump to a higher energy level, which is very unstable, before dropping back to its ground state.

Ground state for selenium, $34$ is:

$"[Ar]3d"^10"4s"^2"4p"^4"$

An excited state electron configuration could be:

$"[Ar]3d"^10"4s"^2"4p"^3"5s"^1"$

One $"4p"$ electron is now occupying the $"5s"$ orbital.

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