Question

how do the following two elements bond together? al³⁺ o²⁻

Explanation:

Step1: Determine ion charges

Aluminum ion is $Al^{3+}$ (charge +3), oxygen ion is $O^{2-}$ (charge -2).

Step2: Use criss - cross method

To balance charges, the magnitude of the charge of one ion becomes the subscript of the other. So, for $Al^{3+}$ and $O^{2-}$, we get $Al_2O_3$ (since 3 from O's charge becomes Al's subscript and 2 from Al's charge becomes O's subscript, and we simplify if possible; here 2 and 3 have no common factor other than 1).

Answer:

$Al_2O_3$ (the option with $Al_2O_3$ text, likely the last option shown with the snowflake icon)