Question

If chemical reactivity increases on going down in group 1 then we can say that Francium is the most reactive in group 1 but Potassium is the most reactive element

Answer 1

Explanation:

All group 1 metals have one electron in its outer shell. As we go down the group, the atom gets bigger. ... Therefore, the attraction between the nucleus and the last electron gets weaker. This makes it easier for the atom to give up the electron which increases its reactivity.All group 1 metals have one electron in its outer shell. As we go down the group, the atom gets bigger. ... Therefore, the attraction between the nucleus and the last electron gets weaker. This makes it easier for the atom to give up the electron which increases its reactivity.