Question

use the periodic table to identify each of the elements below as an alkali metal or an alkaline earth metal. rb: alkali metal, alkaline earth metal. ca: alkali metal, alkaline earth metal.

Explanation:

Alkali metals are in Group 1 of the periodic table and alkaline - earth metals are in Group 2. Rubidium (Rb) is in Group 1, so it is an alkali metal. Calcium (Ca) is in Group 2, so it is an alkaline - earth metal.

Answer:

Rb: alkali metal
Ca: alkaline earth metal