Expanded valence shells
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Expanded valence shells
So according to Professor Lavelle, atoms in period 3 or higher have d-orbitals in valence shell that can accommodate additional electrons. Does that mean all the elements from period 3 onward are exceptions to this octet rule? And can someone explain the phosphorus pentachloride example? How does phosphorus have 10 valence electrons?
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Re: Expanded valence shells
Yes, elements from period 3 onwards will have expanded valence shells because the octet rule applies only to the s and p blocks of the periodic table.
In PCl5, P forms five bonds (10 shared electrons) as it is bonded to 5 atoms of Cl.
In PCl5, P forms five bonds (10 shared electrons) as it is bonded to 5 atoms of Cl.
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Re: Expanded valence shells
I was also wondering the same thing. Is it just P, S, and Cl or is it all the elements in the periods below (including Ga, Ge, etc.) that follow this expanded valence shell rule?
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