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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
electrons.
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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