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Help on 3.9 (b)

Posted: Tue May 01, 2018 5:10 pm
by Amanda Cardenas 1J
Hello. I know how to do 3.9 (a) but I'm having trouble doing part (b). Any help matters. Thank you.

3.9: Which M2+ ions are predicted to have the following ground-state electron configurations:
(b) [Ar]3d^6

Re: Help on 3.9 (b)

Posted: Tue May 01, 2018 5:41 pm
by Sara Veerman-1H
[Ar]3d^6 would be [Ar]3d^(6)4s^(2) if it did not have a charge of 2+. [Ar]3d^(6)4s^(2) is Fe, so [Ar]3d^6 is Fe^(2+). I hope this helps.

Re: Help on 3.9 (b)  [ENDORSED]

Posted: Mon May 07, 2018 2:45 am
by Hannah Lee 1B
M2+ means that the atom has lost two electrons. That means without the 2+ charge it would be [Ar]3d^(6)4s^(2), which is Fe, so M is Fe