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AP Chemistry
The Al3+ ion is an aluminum ion that has lost three electrons, giving it a positive charge.
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Cation: A positively charged ion that is formed when an atom loses one or more electrons.
Valence Electrons: Electrons on an atom's outermost energy level; these are typically involved in forming ions or bonds with other atoms.
Ionization Energy: The amount of energy required to remove an electron from an atom or ion.