Energy of subshells

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manasa933
Posts: 72
Joined: Fri Sep 29, 2017 7:04 am

Energy of subshells

Postby manasa933 » Mon Nov 06, 2017 10:40 am

Does 4d or 5s have a greater energy and why?

Lorie Seuylemezian-2K
Posts: 62
Joined: Fri Sep 29, 2017 7:04 am

Re: Energy of subshells

Postby Lorie Seuylemezian-2K » Mon Nov 06, 2017 11:05 am

5s has a lower energy until there are 2 electrons in that orbital. Once there are 2 electrics 4d has a lower energy!

Ishan Saha 1L
Posts: 60
Joined: Fri Sep 29, 2017 7:03 am

Re: Energy of subshells

Postby Ishan Saha 1L » Mon Nov 06, 2017 11:12 am

4d has a greater energy than 5s when the 4d orbitals are empty. However when the 4d orbital starts to fill up with electrons, it has a lower energy than 5s because the electrons in the 4d orbital shield the electrons in the 5s orbital. Therefore when an element in the d-block is ionized, or loses electrons, it will lose electrons from the s-orbital first because electron shielding in the d-orbital causes the s-orbital electrons to be further away from the nucleus, and therefore are more easily lost.


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