## Help on 3.23

Amanda Cardenas 1J
Posts: 30
Joined: Thu Feb 01, 2018 3:00 am

### Help on 3.23

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.

Yeo Bin Yook 1K
Posts: 30
Joined: Fri Apr 06, 2018 11:05 am

### Re: Help on 3.23

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 :)

Anna De Schutter - 1A
Posts: 66
Joined: Wed Feb 21, 2018 3:01 am

### Re: Help on 3.23

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