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### Help on 3.23

Posted: Thu May 17, 2018 11:04 pm
I need help on parts b and c of 3.23.
3.23: Chlorine can exist in both positive and negative oxidation states.
b)negative oxidation number that chlorine can have?
c) Write the electron configuration for each of these states.

### Re: Help on 3.23

Posted: Fri May 18, 2018 12:16 am
So chlorine's electron configuration is [Ne] 3s^2 3p^5.
The element can only manage to gain one negative charge because there is space for just one electron on the 3p sub-shell. And alternatively it can lose up to 7 at which it will become fully filled up like a noble gas.
Hope this helps :)

### Re: Help on 3.23

Posted: Fri May 18, 2018 12:53 am
To add on to that, the reason chlorine would hypothetically gain one electron or lose 7 electrons is so that it has the electron configuration of a noble gas.
if chlorine gains one electron, it would have the electron configuration of argon: [Ar]
if chlorine loses 7 electrons, it would have the electron configuration of neon: [Ne].

Hope this helps! :)
Anna De Schutter - section 1A