Rubidium is in Group I of the Periodic Table, whereas bromine is in Group VII. Rubidium reacts with bromine to make an ionic compound. Which row shows the change in electrons for rubidium and the correct formula for the rubidium ion?
- Aelectron gained, $\text{Rb}^{+}$
- Belectron gained, $\text{Rb}^{-}$
- Celectron lost, $\text{Rb}^{+}$
- Delectron lost, $\text{Rb}^{-}$