Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove Ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Ch 4 Section 18

Electron Configurations

The wave function for an atom simultaneously depends on/describes all the electrons in the atom
Aufbau principle Each atom is built up by 1. adding the appropriate #s of protons and neutrons in the nucleus as specified by the atomic # & mass #, and 2. adding the necessary number of electrons into orbitals in the way that gives the lowest total energy for the atom
Pauli Exclusion principle No 2 electrons in an atom may have identical sets of 4 quantum numbers.
Hund’s Rule Electrons occupy all the orbitals of a given subshell singly before pairing begins. These unpaired electrons have parallel spins.
Paramagnetism and Diamagnetism Because 2 electrons in the same orbital must be paired, it is possible to calculate the number of orbitals and the number of electrons in each n shell. The number of orbitals per n level is given by n2. The maximum number of electrons per n level is 2n
Created by: tilleryc