expanded-octet

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Kyle Thorin
Posts: 50
Joined: Sat Aug 24, 2019 12:16 am

expanded-octet

Postby Kyle Thorin » Sun Oct 27, 2019 3:19 pm

I know Dr. Lavelle mentioned this in class, but why exactly are we allowed to use an expanded-octet?

Sarah Blake-2I
Posts: 153
Joined: Fri Aug 30, 2019 12:16 am

Re: expanded-octet

Postby Sarah Blake-2I » Sun Oct 27, 2019 3:22 pm

The expanded octet is for elements that have d orbitals in the valence shell which accommodate additional electrons.

Kendall 3H
Posts: 52
Joined: Wed Sep 18, 2019 12:18 am

Re: expanded-octet

Postby Kendall 3H » Sun Oct 27, 2019 3:24 pm

The d subshell of an atom has 5 orbital and can therefore fit 10 electrons, meaning there can be 10 valence electrons rather than only 8.

Rohan Kubba Dis 4B
Posts: 50
Joined: Sat Aug 17, 2019 12:18 am

Re: expanded-octet

Postby Rohan Kubba Dis 4B » Sun Oct 27, 2019 5:22 pm

Is there a general rule for the d-block elements for the expanded octet, or is it completely variable from element to element? Also, how are we able to derive the expanded octet numbers from these elements?

RoshniVarmaDis1K
Posts: 51
Joined: Sat Aug 24, 2019 12:16 am

Re: expanded-octet

Postby RoshniVarmaDis1K » Sun Oct 27, 2019 5:44 pm

Kendall 3H wrote:The d subshell of an atom has 5 orbital and can therefore fit 10 electrons, meaning there can be 10 valence electrons rather than only 8.


To add on, it is possible for some molecules to have central atoms with more than 10 electrons. For example, SF6 has 12 electrons around the central atom.


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