Question

The most active of all the chemical elements is a halogen known as
A. iodine.
B. fluorine.
C. astatine.
D. bromine.

Answer 1

Astatine. Because it has the smaller shell of electrons. I believe

Answer 2

I personally thought flourine. That is because it contains less outer shell electrons than the other elements. This results in the element being able to attract another electron (becoming stable) more easily.