Noble gas electron configurations

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chari_maya 3B
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Joined: Sat Sep 07, 2019 12:18 am

Noble gas electron configurations

Postby chari_maya 3B » Sun Oct 27, 2019 3:07 pm

according the textbook, when sodium loses an electron (Na) - (Na +), the result has an electron configuration similar to neon, which is 1s1, 2s2, 2p6. Why does neon have this configuration, with only 1 electron in the 1s subshell?

Aliya Jain 2B
Posts: 101
Joined: Wed Sep 11, 2019 12:16 am

Re: Noble gas electron configurations

Postby Aliya Jain 2B » Sun Oct 27, 2019 3:12 pm

I'm pretty sure the electron configuration of neon is 1s22s2p6, so I think there are actually two electrons in the 1S sub-shell.

Posts: 108
Joined: Thu Jul 11, 2019 12:15 am

Re: Noble gas electron configurations

Postby rabiasumar2E » Sun Oct 27, 2019 3:13 pm

I don't want to say that the textbook is wrong but I'm sure that neon's electron configuration is 1s2 2s2 2p6.

Nick Lewis 4F
Posts: 111
Joined: Wed Sep 18, 2019 12:18 am

Re: Noble gas electron configurations

Postby Nick Lewis 4F » Sun Oct 27, 2019 11:09 pm

I'm sure the textbook messed up. The first 2 electrons will occupy the 1s orbital, thus denoted as 1s2. It then follows the sequence of 1s2 2s2 2p6...
It doesn't really get messy in configurations until you reach period 4 where 4s fills before 3d.

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