Write 1 for the subscript if needed Na (OH) Write 1 for the subscript if needed Mg (OH) Write 1 for the subscript if needed Mg (OH) Write 1 for the subscript if needed Mg F Write 1 for the subscript if needed Al F Write 1 for the subscript if needed Ca F Write 1 for the subscript if needed Ca Cl Write 1 for the subscript if needed Ca Br Write 1 for the subscript if needed Mg Br Write 1 for the subscript if needed Mg Br |