Question

what is the name of the group that contains the second most reactive metals?
as you go ___ group 17, the elements get more reactive.

Explanation:

For the first question, in the periodic table, group 2 (alkaline earth metals) contains the second most reactive metals. For the second question, in group 17 (halogens), as you go up the group, the elements get more reactive because the atomic radius decreases, and the attraction for electrons increases.

Answer:

1. Alkaline earth metals.
2. Up.