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MissPhiladelphia

I believe the correct answers from the choices listed above are options two and five. It would be metals and hydroxyl ions that are common to bases. Any of a class of compounds that form hydroxyl ions (OH) when dissolved in water, and whose aqueous solutions react with acids to form salts. Hope this answers the question.

Answer: Metal, OH-.

Explanation:

Bases are characterized by the formation of OH- which results when the bases are dissolved in water. Bases that produce many OH- ions in water solution are strong bases. Those that produce few OH- are weak bases. Since it produces hydrogen and hydroxide ions, water has characteristics of both acids and bases.

All bases contain at least one metal plus hydrogen and oxygen combined in a hydroxide ion.

Hope this helps!

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