\[
\begin{array}{|c|c|c|c|c|}
\hline \text{element \#1} & \text{element \#2} & \text{Forms ionic compound?} & \text{empirical formula of ionic compound} & \text{name of ionic compound} \\
\hline \text{oxygen} & \text{rubidium} & \text{yes} & \boxed{\text{Rb}_2\text{O}} & \boxed{\text{Rubidium Oxide}} \\
\hline \text{bromine} & \text{lithium} & \text{yes} & \boxed{\text{LiBr}} & \boxed{\text{Lithium Bromide}} \\
\hline \text{oxygen} & \text{magnesium} & \text{yes} & \boxed{\text{MgO}} & \boxed{\text{Magnesium Oxide}} \\
\hline \text{iodine} & \text{oxygen} & \text{no} & \boxed{} & \boxed{} \\
\hline
\end{array}
\]