Question

5 which elements are known as alkaline earth metals? a magnesium and calcium b sodium and potassium c fluorine and chlorine d helium and neon

Explanation:

Alkaline - earth metals are in Group 2 of the periodic table. Magnesium (Mg) and calcium (Ca) are members of this group. Sodium and potassium are alkali metals (Group 1), fluorine and chlorine are halogens (Group 17), and helium and neon are noble gases (Group 18).

Answer:

A. Magnesium and Calcium