Question

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.

Answer 1

b. gain 2 electrons

Step-by-step 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.