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The compound formed by barium and selenium is barium selenide (BaSe). It is an ionic compound with a 1:1 ratio of barium to selenium atoms.
the correct formula unit for the ionic compound barium oxide is BaO.
The ionic formula for aluminum is Al3+ and for selenium is Se2-. When these two ions combine, the formula for the resulting ionic compound is Al2Se3.
The ionic compound formed from barium and sulfide is barium sulfide, with the chemical formula BaS. In this compound, barium donates two electrons to sulfur to form a stable ionic bond.
An ionic compound, Barium selenide or BaSe is formed, with the ions Ba2+ and Se2-.