Determining Ground State Configuration in 2D Square Well with Aufbau Process

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Homework Statement

use the Aufbau process to determine the ground state electronic configuration for the 2D sqare well if it contains 4 electrons. what is the multiplicity of the ground state electronic configuration? what is the energy of this 2 D 4 electrons system? and is the system diamagnetic or paramagnetic?

Homework Equations

the questions posted above are the second part of the questions, in the first part, the answer tells me that it is a 2D box with 2 degeneracy states nx=1, ny=2 or nx=2, ny=1.

The Attempt at a Solution

2 denerate state means multiplicity of 2? i have no idea of the other questions tho, how do you draw electronic configuration from particle in a box model? plus i thought particle in a box model only predicts pi bonds because they are delocalised? so should the ground state configuration exclude s orbitals and starts with p?

 

[Spinnor]

See the following, half way down,

http://www.andrew.cmu.edu/course/09-105/S98Slides4.html

For the ground state there is room for two electrons and for the next energy level there is room for 4 electrons. See the link below for the rules for filling,

http://en.wikipedia.org/wiki/Aufbau_principle