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===About Electron Orbitals===
: Each '''electron orbital''' only holds a certain number of [[electron]]s.
: These '''orbitals''' and the number of [[electron]]s in an [[atom]] determine the [[chemistry]] of an [[element]].
: The number of '''electron orbitals''' determines the [[Period]] on the [[Periodic Table]].
: The number of [[electron]]s in the last '''orbital''' ([[Outer Shell]]) determines the [[Group (Chemistry)|Group]] on the [[Periodic Table]].