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  • What did Sidgwick and Powell conclude about the arrangements of bonds around multi-covalent atoms?Option: 1 They are unrelated to the total number of

What did Sidgwick and Powell conclude about the arrangements of bonds around multi-covalent atoms?

Option: 1

They are unrelated to the total number of valence shell electrons.


Option: 2

They are related only to the shared electron pairs.


Option: 3

They are related to the total number of valence shell electrons, both shared and unshared.


Option: 4

None of the above.


Answers (1)

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  •  In 1940 Sidgwick and Powell reviewed the structures of molecules then known. They suggested that for molecules and ions that only contain single bonds, the approximate shape can be predicted from the number of electron pairs in the outer or valence shell of the central atom. 
  • The outer shell contains one or more bond pairs of electrons. But it may also contain unshared pairs of electrons (lone pairs).
  •  Bond pairs and Ione pairs were taken as equivalent since all electron pairs take up some space, and since all electron pairs repel each other.
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Ritika Harsh

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