Electron Subshells [ENDORSED]
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Electron Subshells
What does it mean when we say that an electron can penetrate through the inner shells? The book mentions how the s electron can penetrate through the inner shells. Is this valid for all elements?
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Re: Electron Subshells
Electron penetration describes the ability of an electron to approach the nucleus. This ability depends of the attraction of an electron to the nucleus, so 2s electrons have a higher electron penetration than 2p electrons as they have a higher relative electron density near the nucleus. Since, this is a property of electrons in multi-electron systems, I would assume that this is valid for all elements other than Hydrogen.
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Re: Electron Subshells [ENDORSED]
To add to the previous reply, while you move across the period from left to right, Z effective increases. This is due to high electron density within the same shells, which causes electron repulsion to increase. This then allows the nucleus-electron attraction to be strong, and the nucleus can reach the electrons and pull them towards it (penetration).
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