Question

which of the following is a metal in the alkaline earth metals family? a sodium (na) b barium (ba) c cobalt (co) d aluminum (al)

Explanation:

Alkaline - earth metals are in Group 2 of the periodic table. Barium is in Group 2. Sodium is an alkali - metal (Group 1), cobalt is a transition metal, and aluminum is a post - transition metal.

Answer:

B. Barium (Ba)