# How does a antimony-122 atom become a antimony -122 ion with a 3^- charge?

Dec 18, 2016

#### Answer:

It needs to gain three electron to become an ion with a charge of $3 -$.

#### Explanation:

It needs to gain three electron to become an ion with a charge of $3 -$.

The amount of electron in a neutral isotope still must equal the amount of proton so that there is no net charge about the species.