P, S, Cl can have more than 8 electrons?

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Jennifer1E
Posts: 25
Joined: Fri Jun 23, 2017 11:39 am

P, S, Cl can have more than 8 electrons?

Postby Jennifer1E » Sun Jul 16, 2017 6:02 pm

Why can phosphorus, sulfur, and chlorine exceed more than 8 electrons?

Gwyndolyn
Posts: 23
Joined: Wed Nov 16, 2016 3:03 am

Re: P, S, Cl can have more than 8 electrons?

Postby Gwyndolyn » Sun Jul 16, 2017 6:14 pm

The s2p6 octet is usually what gets filled with electrons. But once you pass the second period on the periodic table and reach n=3 there is the d sublevel, in addition to the s and p orbitals, which can accommodate more electrons.

Jordan Larrea 1E
Posts: 8
Joined: Fri Jun 23, 2017 11:39 am

Re: P, S, Cl can have more than 8 electrons?

Postby Jordan Larrea 1E » Sun Jul 16, 2017 9:46 pm

Once you get to the third row, you have the 3d orbital to consider. Remember that the transition metals are one less than the row they're in, meaning the ones in the n=4 row have the 3d configuration. This means that the elements in the third row can use the d orbital to exceed the octet rule. It is stated that P, S, and Cl can have expanded octets because the elements before it in the third row, like Al or Na lose electrons.


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