Question

(a) How does the chemical reactivity of alkali metals vary on going down in group 1 of the periodic table?
(b) How does the chemical reactivity of the halogens vary on going down in group 17 of the periodic table?

Answer 1

Answer:

The reactivity of Group 1 elements increases as you go down the group because: ... the outer electron gets further from the nucleus as you go down the group. the attraction between the nucleus and outer electron gets weaker as you go down the group - so the electron is more easily lost

The chemical reactivity of group 17 elements decreases down the group. ... So down the group there is an increase in the atomic radius and hence the effective nuclear force decrease as the atomic radius increases and this leads to the decreased chemical reactivity down the group

hope this helps you

Answer 2

Answer:

The chemical reactivity of group 17 elements decreases down the group. ... So down the group there is an increase in the atomic radius and hence the effective nuclear force decrease as the atomic radius increases and this leads to the decreased chemical reactivity down the group