Question

ch. 3 - matter quiz
started: sep 16 at 7:25pm
quiz instructions
question 10
which element is an alkaline earth metal?
calcium
sodium
aluminum
copper

Explanation:

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

Answer:

calcium