Which ion is a negative ion made of oxygen and hydrogen?

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Multiple Choice

Which ion is a negative ion made of oxygen and hydrogen?

Explanation:
A negative ion made of oxygen and hydrogen is the hydroxide ion, OH−. It’s formed when one hydrogen atom bonds to one oxygen atom and gains an extra electron, giving it a −1 charge. This distinguishes it from a hydrogen ion, which is just a bare proton with a positive charge, and from sulfate or nitrate, which include oxygen but also sulfur or nitrogen and have different formulas and charges. In solutions, bases like NaOH release OH− ions, illustrating how this ion carries the negative charge and comprises only oxygen and hydrogen.

A negative ion made of oxygen and hydrogen is the hydroxide ion, OH−. It’s formed when one hydrogen atom bonds to one oxygen atom and gains an extra electron, giving it a −1 charge. This distinguishes it from a hydrogen ion, which is just a bare proton with a positive charge, and from sulfate or nitrate, which include oxygen but also sulfur or nitrogen and have different formulas and charges. In solutions, bases like NaOH release OH− ions, illustrating how this ion carries the negative charge and comprises only oxygen and hydrogen.

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