Exceptions

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Jedrick Zablan 3L
Posts: 68
Joined: Sat Aug 17, 2019 12:17 am

Exceptions

Postby Jedrick Zablan 3L » Sat Nov 02, 2019 2:02 pm

Can someone please tell me some exceptions to the Periodic Table trends?

Matthew ILG 1L
Posts: 112
Joined: Sat Aug 17, 2019 12:15 am

Re: Exceptions

Postby Matthew ILG 1L » Sat Nov 02, 2019 2:46 pm

The trends, such as electronegativity, atomic radius, and ionization energy, are typically very straight forward and have little to no exceptions.

SnehinRajkumar1L
Posts: 101
Joined: Thu Jul 11, 2019 12:15 am

Re: Exceptions

Postby SnehinRajkumar1L » Sat Nov 02, 2019 2:46 pm

One exception is for the ionization energy of group 15 and 16 elements. Although it typically increases across a row, the ionization energy of group 16 elements is actually less than group 15 elements because the half-filled orbital is more stable, and harder to remove an electron.

Megan Jung 3A
Posts: 50
Joined: Thu Jul 11, 2019 12:17 am

Re: Exceptions

Postby Megan Jung 3A » Sat Nov 02, 2019 2:58 pm

There is an exception to the ionization trend with Nitrogen and Oxygen. Based on periodic trends, one would think O has a higher ionization energy than N, however, due to the electron configuration of N this is not the case. N's electron configuration presents a half filled 2p orbital which is actually more stable than O's electron configuration. Since it is more stable, N will have a higher ionization energy than O because it is harder to remove an electron.


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