Moderators: Chem_Mod, Chem_Admin

Posts: 103
Joined: Thu Jul 11, 2019 12:17 am
Been upvoted: 1 time


Postby JohnWalkiewicz2J » Fri Nov 01, 2019 3:57 pm

Are there any significant exceptions in atomic trends that would be important to memorize for the midterm?

Posts: 51
Joined: Sat Jul 20, 2019 12:15 am

Re: Exceptions

Postby xenamclean_1G » Fri Nov 01, 2019 4:05 pm

I think some exceptions worth remembering are : Boron has a lower ionization energy than Beryllium and Oxygen has a lower ionization energy than Nitrogen (which contradicts the general trend). Nitrogen's electron affinity is lower than carbon's and that Neon's is lower than fluorine's and lithiums.

Posts: 104
Joined: Sat Jul 20, 2019 12:15 am

Re: Exceptions

Postby alicechien_4F » Fri Nov 01, 2019 11:21 pm

The noble gases do not follow the electron affinity trend because they have a full set of valence electrons. They are also often excluded from electronegativity trends because they do not bond since their shell is full. Hope this helps!

Posts: 52
Joined: Wed Sep 11, 2019 12:16 am

Re: Exceptions

Postby TYun_1C » Fri Nov 01, 2019 11:56 pm

And a half filled shell is more stable than one that is half filled with an extra electron (regarding ionization energy etc.).

Return to “Trends in The Periodic Table”

Who is online

Users browsing this forum: No registered users and 1 guest