Put the aufbau principle, Hund's rule, and the Pauli exclusion principle to use with this worksheet! Not only that, but you will be able to SHOW your students what the differences are in shells, subshells and orbitals.
Students write the abbreviated electron configuration and then fill up the electron orbitals until they get to the valence shell. You should instruct the students that the number of electrons that goes in each subshell comes from the exponents in the abbreviated electron configuration. Then they will add spin up electrons in each subshell until each orbital has a spin up electron. Then, the students should be instructed to add any remaining electrons in the orbitals spin down.
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The individual worksheets can be found here:
What's The Difference in a Subshell Orbital or a Shell Product# 3578346
Learning to Draw Degenerate Electrons Product# 3689365