What is the number of the group that has the most reactive nonmetals (give number and letter- Ex 1A, 2A, etc.)?

Group 7A

Explanation:

The group 7A elements consists of the most reactive non-metals on the periodic table.

This group is known as the group of halogens. They consist of element fluorine, chlorine, bromine, iodine and astatine.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

1. they vary with a higher number because boiling is way hotter than melting