Electron Subshell

Tags

Chem/Atom

Cegep/2

Word count

88 words

Reading time

1 minute

Smaller orbit of an electron around the nucleus
Subshells of different shape make up electron shell

[!abstract]+ Aufbau principle
Subshells are filled in increasing order of energy level.

Exceptions

Some elements deviate from this rule due to enhanced stability from half or fully filled subshell:

• $\mathrm{Cr}:[\mathrm{Ar}]4\mathrm{s}{\phantom{A}}^{1}3\mathrm{d}{\phantom{A}}^5$
• $\mathrm{Cu}:[\mathrm{Ar}]4\mathrm{s}{\phantom{A}}^{1}3\mathrm{d}{\phantom{A}}^{10}$
• $\mathrm{Mo}:[\mathrm{Kr}]5\mathrm{s}{\phantom{A}}^{1}4\mathrm{d}{\phantom{A}}^5$
• $\mathrm{Ag}:[\mathrm{Kr}]5\mathrm{s}{\phantom{A}}^{1}4\mathrm{d}{\phantom{A}}^{10}$

Contributors

Ajitani Hifumi

Changelog

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