configuration for ions

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705088777
Posts: 37
Joined: Fri Sep 28, 2018 12:18 am

configuration for ions

Postby 705088777 » Tue Oct 30, 2018 3:01 pm

How do you write the electron configurations for ions? like [F]-

ChathuriGunasekera1D
Posts: 78
Joined: Fri Sep 28, 2018 12:17 am

Re: configuration for ions

Postby ChathuriGunasekera1D » Tue Oct 30, 2018 3:26 pm

So F normally is [He] 2s2 2p5 but because you have F-, you add another electron. This electron would go to the p orbital (becuase 2p5 still has space for one more electron), and then you have [He] 2s2 2p6 which is the same as [Ar].

Hailey Boehm 2H
Posts: 71
Joined: Fri Sep 28, 2018 12:24 am

Re: configuration for ions

Postby Hailey Boehm 2H » Tue Oct 30, 2018 4:00 pm

In general for ions, when there is a negative charge you add that number of electrons and when there is a positive charge you add that number of electrons. Then, once you know how many electrons the ion has, you go through the periodic table and start writing the electron configurations beginning with 1s^2,2s^2,etc.. until you have accounted for all the electrons present in the ion. Hope this helps!


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