Question

select the correct answer. which of these elements is an alkaline earth metal? o a. potassium (k) o b. calcium (ca) o c. chromium (cr) o d. gallium (ga)

Explanation:

Alkaline earth metals are in group 2 of the periodic table. Calcium (Ca) is in group 2. Potassium (K) is an alkali metal (group 1). Chromium (Cr) is a transition metal. Gallium (Ga) is a post - transition metal.

Answer:

B. calcium (Ca)