The following terms can be used to describe an Al atom having a charge of +3
An ion is chemical specie bearing a positive or negative charge. A chemical specie that bears a positive charge is called a cation while a chemical specie that bears a negative charge is called an anion.
Al is a metal of group 13. Metals are electropositive hence they form positive ions. This implies that the ion formed by Al must be a cation.
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