In the periodic table, the maximum chemical reactivity is at the extreme left (alkali metals) and extreams right (halongens). Which properties of these two groups are responsible for this ?

In the periodic table, the maximum chemical reactivity is at the extre

1.	In the periodic table, the maximum chemical reactivity is at the extreme left (alkali metals) and extreams right (halongens). Which properties of these two groups are responsible for this ?
Answer» Least ionisaiton enthalpy on the LEFT and HIGHEST NEGATIVE electron gain enthalpy on the right Non-metallic CHARACTER on the left and meatallic character on the right High atomic RADII on the left and small atomic radii on the right Highest electronegativity on the right Answer :A