Question

When an oxygen atom forms an ion, it gains two electrons. What is the electrical charge of the oxygen ion?

A.-2

B.+2

C.+1

D.-1

Answer 1

A is the corect answer

Step-by-step explanation:

Answer 2

The oxygen atom, before it gains these two electrons, has a neutral charge, meaning that it has as many protons as electrons. After it gains 2 electrons, it has 2 more electrons than protons. Each electron has a charge of -1, so the whole molecule will have a charge of -2. The correct answer is a)!