Homework 2A.9

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Hannah_1G
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Joined: Wed Sep 18, 2019 12:22 am

Homework 2A.9

Postby Hannah_1G » Mon Oct 28, 2019 7:28 pm

The question asks which M2+ ions are expected to have the following ground-state electron configurations: a) [Ar]3d7 b) [Ar]3d6
I'm confused by what the question is asking and how the electron configuration can change for this ion?

Alex Tchekanov Dis 2k
Posts: 118
Joined: Sat Aug 24, 2019 12:16 am

Re: Homework 2A.9

Postby Alex Tchekanov Dis 2k » Mon Oct 28, 2019 8:28 pm

The question is the same as asking you to find the electron configuration of an ion with a 2+ charge... but backward. So, in this case, you have to see what element lines up with the [Ar]3d7 and then identify the ion that it would be. In the case of a) the answer would be the Co 2+ ion -- this is because the electron configuration for Co is [Ar]3d74s2 and since it is a 2+ ion, the first two electrons that are taken off are the 4s2 electrons b) would be the Fe 2+ ion for similar reasons

Hannah_1G
Posts: 100
Joined: Wed Sep 18, 2019 12:22 am

Re: Homework 2A.9

Postby Hannah_1G » Tue Oct 29, 2019 2:59 pm

Thank you! So this question is asking for what possible ions follow those configurations and have a 2+ charge?


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