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Principal Energy Levels (PEL) /Electron Shells
PRINCIPAL ENERGY LEVELS (PEL)/ ELECTRON SHELLS: Orbitals of electrons
Each shell can hold up to a maximum number of electrons:
1. Shell #1 holds up to 2 electrons.
2. Shell #2 holds up 8 electrons.
3. Shell #3 holds up to 18 electrons. 4. Shell #4 holds up to 32 electrons.
Nucleus
Say 2, 8, 18, 32 five times and you’ll remember it...hopefully. But don’t worry, we’ll give you another way to remember this.
Sorry, no hint for this one.
52 © UNIT 2: ATOMIC STRUCTURE
