Aufbau vs Hunds

Moderators: Chem_Mod, Chem_Admin

Celine 1F
Posts: 120
Joined: Fri Aug 02, 2019 12:16 am

Aufbau vs Hunds

Postby Celine 1F » Sun Nov 03, 2019 8:51 pm

What is the difference between Aufbau's Principle and Hunds rule?

Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Re: Aufbau vs Hunds

Postby Shimei_2F » Sun Nov 03, 2019 8:54 pm

The Aufbau principle states that lower energy orbitals fill before higher energy orbitals. Hund's Rule states that one electron goes into each orbital until all of them are half full before pairing up.

Posts: 110
Joined: Sat Jul 20, 2019 12:16 am

Re: Aufbau vs Hunds

Postby MTanikella_1K » Sun Nov 03, 2019 9:02 pm

Aufbau's principle shows the order in which orbitals should be filled while Hund's rule describes that every orbital in a subshell should be occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.

Posts: 112
Joined: Wed Sep 18, 2019 12:21 am

Re: Aufbau vs Hunds

Postby AGaeta_2C » Sun Nov 03, 2019 9:08 pm

Hund's Rule states that due to electron/electron repulsion, orbitals must be occupied by one electron before they can be occupied by a second electron.
The Aufbau Principle states that electrons occupy lower energy orbitals before higher energy orbitals.

Jesalynne 2F
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

Re: Aufbau vs Hunds

Postby Jesalynne 2F » Sun Nov 03, 2019 9:16 pm

Afbau states that the lower energy levels must be occupied before the higher ones can be filled and Hund’s rule states that the orbitals must be filled with one electron before they can be paired.

Jasmine 2C
Posts: 184
Joined: Wed Sep 18, 2019 12:18 am

Re: Aufbau vs Hunds

Postby Jasmine 2C » Sun Nov 03, 2019 9:19 pm

Aufbau Principle is the building-up principle. You need to occupy the lowest energy level before going higher in energy. We always want the lowest energy electron configuration.

Posts: 102
Joined: Thu Jul 25, 2019 12:16 am

Re: Aufbau vs Hunds

Postby CalvinTNguyen2D » Sun Nov 03, 2019 11:17 pm

The Aufbau principle is that electrons need to first occupy the lower energy levels before filling higher energy ones- it literally means "build-up" in German! Hund's rule says that the orbitals need to have one electron first before they can be paired up with another electron.

Return to “Electron Configurations for Multi-Electron Atoms”

Who is online

Users browsing this forum: Abril Guanes 3D, Kailani_Dial_3G, Norah Gidanian 3J, Samantha Pedersen 2D and 4 guests