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29.Selenium's oxidation number is -2. To become stable it must...Select one:a. lose 2 electrons.b. gain 2 electrons.c. lose 4 electrons.d. share 2 electrons.

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Answer

b. gain 2 electrons

Explanation

A positive or negative number that indicates how many electrons an atom has gained, lost, or shared to become stable.

If selenium's oxidation number is -2, it means it must gain two electrons to become stable.

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