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connie 2C
Posts: 106
Joined: Thu Jul 11, 2019 12:17 am


Postby connie 2C » Wed Oct 23, 2019 9:08 pm

how come in some electron configurations the d-orbital comes before the s-orbital like in titanium?

Montana James 4G
Posts: 46
Joined: Wed Sep 18, 2019 12:21 am

Re: order

Postby Montana James 4G » Wed Oct 23, 2019 10:28 pm

I think it's because the d-orbital has lower energy than the s-orbital for some elements

Ryan Chang 1C
Posts: 105
Joined: Sat Aug 24, 2019 12:17 am

Re: order

Postby Ryan Chang 1C » Wed Oct 23, 2019 11:14 pm

D-orbitals have a slightly lower energy level than s-orbitals in the same period, therefore d-orbitals are filled with electrons first before s-orbitals. For example, the 3d orbital would be filled with electrons before the 4s orbital.

Jared Khoo 1G
Posts: 107
Joined: Wed Sep 18, 2019 12:16 am

Re: order

Postby Jared Khoo 1G » Wed Oct 23, 2019 11:26 pm

With some exceptions where the s orbital is lower energy, since the d orbital is in a different shell you order that first. Eg. 4d then 5s.

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