Answer:

H, Na, and K are belong same group and Be, Mg and Ca are belong same group.

if you satisfied with my answer then make it brilientlist.

Answer:

Hydrogen(H) - Lithium is another element belonging to its group as both their valencies are same i.e., 1.

Beryllium(Be) - Calcium is another element belonging to its group as both their valencies are same i.e., 2.

Sodium(Na) - Potassium is another element belonging to its group as both their valencies are same i.e., 1.

Magnesium(Mg) - Barium is another element belonging to its group as both their valencies are same i.e., 2.

Hope it helps..!!