Aufbau Principle

Moderators: Chem_Mod, Chem_Admin

bellaha4F
Posts: 104
Joined: Wed Sep 18, 2019 12:20 am

Aufbau Principle

Postby bellaha4F » Wed Oct 23, 2019 8:24 pm

Can someone explain what the Aufbau/building up principle is?

Anika Chakrabarti 1A
Posts: 102
Joined: Sat Aug 24, 2019 12:17 am

Re: Aufbau Principle

Postby Anika Chakrabarti 1A » Wed Oct 23, 2019 8:29 pm

This means that electrons always fill up the lowest energy orbitals first before occupying the higher orbitals. So when we write electron configurations, we start with 1s, then 2s, etc.

Micah3J
Posts: 100
Joined: Tue Oct 08, 2019 12:16 am

Re: Aufbau Principle

Postby Micah3J » Thu Oct 24, 2019 6:56 pm

What kind of questions might there be regarding the Aufbau Principle on a test?

Zaynab Hashm 2I
Posts: 110
Joined: Wed Sep 11, 2019 12:15 am
Been upvoted: 1 time

Re: Aufbau Principle

Postby Zaynab Hashm 2I » Thu Oct 24, 2019 6:59 pm

Micah3J wrote:What kind of questions might there be regarding the Aufbau Principle on a test?

Questions regarding the electron configurations of elements. So you must be able to know the principles in order to determine the correct electron configurations or to figure out whether or not the electron is in a ground or excited state just like in question 1E.7.

Micah3J
Posts: 100
Joined: Tue Oct 08, 2019 12:16 am

Re: Aufbau Principle

Postby Micah3J » Thu Oct 24, 2019 7:03 pm

Zaynab Hashm 1C wrote:
Micah3J wrote:What kind of questions might there be regarding the Aufbau Principle on a test?

Questions regarding the electron configurations of elements. So you must be able to know the principles in order to determine the correct electron configurations or to figure out whether or not the electron is in a ground or excited state just like in question 1E.7.


Okay thanks, I'll go take a look

Catherine Daye 1L
Posts: 104
Joined: Wed Sep 11, 2019 12:16 am

Re: Aufbau Principle

Postby Catherine Daye 1L » Thu Oct 24, 2019 8:26 pm

He might also ask questions that require you to differentiate the three different principles we learned. Ex. what principle explains the electron configuration 1s^2 2s^2 2p^6 for carbon? why can't 1s^2 2s^2 2p^3 (nitrogen) have paired electrons?

melinak1
Posts: 25
Joined: Tue Sep 24, 2019 12:17 am

Re: Aufbau Principle

Postby melinak1 » Fri Oct 25, 2019 1:35 am

Zaynab Hashm 1C wrote:
Micah3J wrote:What kind of questions might there be regarding the Aufbau Principle on a test?

Questions regarding the electron configurations of elements. So you must be able to know the principles in order to determine the correct electron configurations or to figure out whether or not the electron is in a ground or excited state just like in question 1E.7.


thank you!

Destiny_Ryales_3J
Posts: 38
Joined: Fri Sep 28, 2018 12:28 am

Re: Aufbau Principle

Postby Destiny_Ryales_3J » Fri Oct 25, 2019 8:46 am

Is this then the same thing as the spin rules where we must place the “spins” of electrons properly?

Siya Shah 1J
Posts: 50
Joined: Sat Aug 17, 2019 12:15 am

Re: Aufbau Principle

Postby Siya Shah 1J » Fri Oct 25, 2019 8:46 am

Micah3J wrote:What kind of questions might there be regarding the Aufbau Principle on a test?


The Aufbau Principle is mostly applied to writing out electron configurations for atoms of different elements.

Aprice_1J
Posts: 55
Joined: Wed Sep 18, 2019 12:16 am

Re: Aufbau Principle

Postby Aprice_1J » Sat Oct 26, 2019 11:15 pm

Can someone explain how to set this up so that you can get to the electron configuration. I understand that you want to fill the shells so that they become more stable and how to put in the spin state but what is the order that you fill in the shells?

505306205
Posts: 97
Joined: Thu Jul 25, 2019 12:15 am

Re: Aufbau Principle

Postby 505306205 » Sun Oct 27, 2019 12:05 am

Aprice_1J wrote:Can someone explain how to set this up so that you can get to the electron configuration. I understand that you want to fill the shells so that they become more stable and how to put in the spin state but what is the order that you fill in the shells?


You fill the shells in order of increasing energy. The periodic table is also a good guide to help with the order in which shells are filled. The leftmost groups represent the s orbital, the middle represents the d orbital, and the rightmost groups represent the p orbital. The energy level begins with 1 at Hydrogen and increases as you go down the group.

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

Re: Aufbau Principle

Postby Celine 1F » Sun Oct 27, 2019 12:49 am

electrons tend to fill up the lower energy orbitals before the higher energy ones. Energy levels begins at 1 and continues to increase by groups


Return to “Trends in The Periodic Table”

Who is online

Users browsing this forum: No registered users and 1 guest