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Write the correct chemical formula for the ionic compound that forms.


barium oxide (Ba and O)
Formula: ______________

aluminum oxide (Al and O)
Formula: ______________

sodium nitride (Na and N)
Formula: ______________

calcium chloride (Ca and Cl)
Formula: ______________

sodium oxide (Na and O)
Formula: _______________

magnesium phosphide (Mg and P)
Formula: _____________