Which is larger O - or S 2- ?  [ENDORSED]

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Nhi Vo 3A
Posts: 50
Joined: Sat Jul 09, 2016 3:00 am

Which is larger O - or S 2- ?

Postby Nhi Vo 3A » Fri Dec 02, 2016 1:02 pm

Which anion is larger O ^- or S ^ 2- ?

Give two reasons why.

Tanner Baroni 3I
Posts: 17
Joined: Wed Sep 21, 2016 2:56 pm

Re: Which is larger O - or S 2- ?

Postby Tanner Baroni 3I » Fri Dec 02, 2016 1:09 pm

S^2- is larger because atomic size increases as you go down the periodic table and it has a complete other orbital.

Isaiah Little 1A 14B
Posts: 50
Joined: Fri Sep 29, 2017 7:05 am

Re: Which is larger O - or S 2- ?

Postby Isaiah Little 1A 14B » Tue Oct 10, 2017 5:20 pm

S2- is larger than O- because S2- has more protons and thus a stronger pull on its electrons than O- does, so it has a smaller atomic radius.

Krupa Prajapati
Posts: 50
Joined: Sat Jul 22, 2017 3:00 am

Re: Which is larger O - or S 2- ?  [ENDORSED]

Postby Krupa Prajapati » Wed Oct 18, 2017 10:36 pm

S^-2 is also larger because it has more electrons in its outer shell, which causes repulsion. This is called the shielding effect, and leads to S^-2 having a greater atomic radius than O^-


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