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Electron Configuration
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It is the distribution of e- of an atom or molecule. Representation of the arrangement of electrons distributed among the orbital shells and subshells. Often used to describe the orbitals of an atom in it’s ground state.

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  • August 25, 2021
  • 20
  • 2020/2021
  • Class notes
  • Dr gugu mnguni
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ELECTRON
CONFIGURATION
Dr Gugu Mnguni
Mangosuthu University of Technology
Department of Environmental Health
Academic year: 2020

, Electron configuration
■ It is the distribution of e- of an atom or molecule.
■ Representation of the arrangement of electrons distributed among the orb
shells and subshells.
■ Often used to describe the orbitals of an atom in it’s ground state.
■ Also used to describe/represent an atom that has ionised to an anion (-ve
charged ion) or cation (+vely charged ion).
■ Electron configuration of an element depends on it’s position in the period
table.

, Electron shells
■ An e- shell is a set of allowed states that share the same principal number
(the # before the letter I the orbital label), that electrons may occupy .
– Example - 1st shell can occupy 2e-, 2nd shell 8e-, 3rd shell 18 e- etc.

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