Expanded Valence Shells
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Re: Expanded Valence Shells
An expanded valence shell is one that has more than 8 electrons. Only some elements can have them and so if a lewis structure shows more than 8 electrons, it has an expanded shell.
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Re: Expanded Valence Shells
Yazmin Bocanegra 3L wrote:What is an expanded valence shell, and how do you identify one?
Also, any element may have an expanded valence shell, as long as it does not have n=1 or n=2 quantum number. Elements, phosphorus and after can have an expanded valence shell.
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Re: Expanded Valence Shells
Expanded valence shell = element having more than octet. They occur for elements n=3 and above because the element can make use of empty d orbitals for bonding. For example, sulfur is [Ne]3s^2 3p^4 in its ground state. So, you might expect it to only “have room” for two more electrons to fill the 3p sub shell and therefore behave like oxygen, but it can use the 3d sub shell for bonding as well, and “put” electrons there. Oxygen cannot have an expanded valence shell because there is no 2d sub shell for it to use.
Re: Expanded Valence Shells
An expanded valence shell is when there are more than eight valence electrons. Elements that have an expanded valence shell includes phosphorus or sulfur. These can only occur when the valence shell has enough orbitals to accommodate the extra electrons.
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