Question

the element rubidium is located in group 1, while strontium is located in group 2. which ions are commonly formed by each?
a $rb^{+}$ and $sr^{2+}$
$rb^{-}$ and $sr^{2-}$
c $rb^{2+}$ and $sr^{+}$
d neither group 1 nor group 2 elements typically form ions.

Explanation:

Group 1 elements (alkali metals) lose one electron to form \(+1\) ions. Rubidium (\(Rb\)) is a group 1 element, so it forms \(Rb^{+}\). Group 2 elements (alkaline - earth metals) lose two electrons to form \(+2\) ions. Strontium (\(Sr\)) is a group 2 element, so it forms \(Sr^{2+}\).

Answer:

A. \(Rb^{+}\) and \(Sr^{2+}\)