Expanded Octet Rule

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Kristina Nguyen 1C
Posts: 29
Joined: Thu Jul 27, 2017 3:00 am

Expanded Octet Rule

Postby Kristina Nguyen 1C » Sun Nov 05, 2017 6:20 pm

Can someone please explain why phosphorous can form an expanded octet but not other elements close to it like silicon?

sahiltelang-Discussion 1J
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Re: Expanded Octet Rule

Postby sahiltelang-Discussion 1J » Sun Nov 05, 2017 7:28 pm

Phosphorous can expand to the d orbital allowing it to bond more, beyond its octet.

SantanaRodriguezDis1G
Posts: 56
Joined: Sat Jul 22, 2017 3:00 am

Re: Expanded Octet Rule

Postby SantanaRodriguezDis1G » Sun Nov 05, 2017 7:30 pm

Phosphorus is a bigger size and has an empty d-orbital

Sophia Bozone 2G
Posts: 51
Joined: Fri Sep 29, 2017 7:07 am

Re: Expanded Octet Rule

Postby Sophia Bozone 2G » Sun Nov 05, 2017 11:07 pm

Non-metals with a d-subshell are able to have expanded octets. For instance, elements 13-17 can have expanded octets. You’ll know to draw an expanded octet when the central atom is bonded to more than 4 elements. The elements that are metals (transition metals included) will tend to give away electrons, and therefore won’t have expanded octets. Xenon can hold 14 electrons because it has an f subshell, which contains 7 orbitals, each capable of holding 2 electrons.


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