Question

potassium is considered the most electropositive metal in the activity series of metals. why?​

Answer 1

Potassium is more reactive than Sodium and Lithium because Potassium is bigger than them. So outermost electron is farther away from nucleus. So the ionization energy in K is less than that in Na or in Li. So Potassium is more reactive than many other metals.

Answer 2

Answer:

Because it is only alkali metal among the given metal.