Question

why k is less reactive than rb?​

Answer 1

Explanation:

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.However, Rubidium Rb and Cesium Cs are more reactive than Potassium.

Answer 2

Answer:

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. However, Rubidium Rb and Cesium Cs are more reactive than Potassium.