Question

3. Look at the positions of calcium, beryllium, and magnesium on the periodic table. Based on their locations, predict how many valence electrons these elements have and predict what the reactivity of these elements will generally be.

Answer 1

They all have 2 valence electrons and less reactive than other metals

Answer 2

They are less reactive than alkali metals (Group 1) but more reactive than transition metals. They increase in reactivity as you go down the column.

Answer 3

but beryilium is xcptn as it is amphoteric in nature :)