Question

elements that are electropositive in nature

Answer 1

The definition of electropositivity is the tendency of an atom to lose electrons from its outermost shell and become positively charged ion (cation). Now when we look at the periodic table, we see two groups that contain highly electropositive elements which are alkali metals (group I) and alkaline-earth metals (group II). However alkali metals are more electropositive since they need to lose only one electron to complete their octet (stable electronic configuration),

In a group, you have to consider 2 factors, atomic size and effective shielding. Down the group, the size of an atom increases because of increasing number of shells and observe that the outermost electron gets further away from nucleus as the number of shells increase which in turn weakens the hold of nucleus on the outermost electron and hence leads to greater tendency to lose an electron. So down the group, electropositivity increases,