Atomic vs ionic radius

Moderators: Chem_Mod, Chem_Admin

NatBrown1I
Posts: 62
Joined: Fri Sep 28, 2018 12:17 am

Atomic vs ionic radius

Postby NatBrown1I » Sun Nov 11, 2018 9:34 pm

What is the difference between ionic and atomic radius and their trends?

KatrinaPho_2I
Posts: 60
Joined: Fri Sep 28, 2018 12:28 am

Re: Atomic vs ionic radius

Postby KatrinaPho_2I » Sun Nov 11, 2018 9:39 pm

When the atom is neutral, the atomic and ionic radius are the same. This isn't true for anions and cations, though. If the atom loses an electron and becomes a cation,the atom becomes positively charged and the ionic radius is smaller than the atomic radius because the atom loses an electron energy shell.

Lily Benitez 2G
Posts: 63
Joined: Fri Sep 28, 2018 12:29 am

Re: Atomic vs ionic radius

Postby Lily Benitez 2G » Sun Nov 11, 2018 9:39 pm

When it comes to the neutral atom both ionic and atomic radius is the same. But we know that many elements can lose or gain electrons converting them to anions or cations. We know that if an atom loses an electron the radius decreases, if the ion gains an electron the radius increases. This is where the ionic radius comes from.

Connie Chen 3D
Posts: 31
Joined: Mon Jan 08, 2018 8:12 am

Re: Atomic vs ionic radius

Postby Connie Chen 3D » Mon Dec 03, 2018 11:33 pm

Anions are bigger because they have more electrons. Cations are smaller because they have less electrons. As a result, their radius is different than when they're just a normal, non-charged atom. Ionic radius = for cation, anions; atomic radius = for non-charged.

jguiman4H
Posts: 31
Joined: Fri Sep 28, 2018 12:29 am

Re: Atomic vs ionic radius

Postby jguiman4H » Tue Dec 04, 2018 12:03 am

Yes, essentially anion radius > neutral atom radius > cation radius. Atomic radius increases down a group (as amount of electrons/shells increases) and decreases from left to right (as more protons draw in electron shells more).

Victoria Otuya 4F
Posts: 50
Joined: Wed Sep 18, 2019 12:21 am

Re: Atomic vs ionic radius

Postby Victoria Otuya 4F » Thu Oct 17, 2019 3:32 am

The atomic and ionic radius are the same but If the atom loses its outermost electron, it is smaller than the atomic radius because the atom loses an electron energy shell.

Audrie Chan-3B
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

Re: Atomic vs ionic radius

Postby Audrie Chan-3B » Thu Oct 17, 2019 11:27 am

The trend for atomic radius increases when going left on the periodic table and going down. The trend for ionic radius is the opposite (increases going right and up).


Return to “Trends in The Periodic Table”

Who is online

Users browsing this forum: No registered users and 1 guest