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Chapter 5 Notes
Electron Structure
The number of electrons allowed in each shell changes as the shell
number goes up.
Shell number Number of electrons
1 2
2 8
3 18
4 32
Shells are energy levels and the energy increases. The energy level
number is called the principal quantum…

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Electrons in an orbital must have opposite spins as it helps to
counteract the repulsion between the negative charges of the two
One electron occupies each orbital before pairing begins .
Electronic configurations should be shown in shell order rather than
order of filling.
The highest energy subshell determines…


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