Question

Rank the nonmetals in each set from most reactive (1) to least reactive (3).

Bromine: ?

Chlorine: ?

Iodine: ?

Answer 1

1. Chlorine
2. Bromine
3. Iodine

Step-by-step explanation:

All three of these elements fall in group 7 of the periodic table and are called Halogens. Chlorine is the most reactive of these elements because it comes before the other two in the table then followed by Bromine and then Iodine.

Reactivity decreases in the group 7 elements as one moves to the latter elements due to the increase in shells surrounding the nucleus.

This is because reactivity happens as the protons in the nucleus attract electrons but when more shells are piled on, the strength of this attraction decreases as the distance increases such that they will not be as reactive anymore.