Final answer:
The Lewis dot diagram for Al (aluminum) has 3 dots around the symbol 'Al'. The ion formed by aluminum is Al³+, a cation with a charge of 3+.
Step-by-step explanation:
The Lewis dot diagram for Al (aluminum) can be drawn by representing the valence electrons as dots around the chemical symbol of the element. Aluminum is an element in group 13, so it has 3 valence electrons. Therefore, the Lewis dot diagram for aluminum will consist of 3 dots surrounding the symbol 'Al'.
The charge for aluminum can be predicted based on its position in the periodic table. Aluminum is in group 13, so it tends to lose 3 electrons to achieve a stable electron configuration. Therefore, the ion formed by aluminum is a cation with a charge of 3+. It is called an aluminum ion or Al³+.