Question

If a metal is placed in an ionic solution containing another metal and
no reaction occurs, then the metal originally in the solution is
a. a halogen
b. higher on the activity series.
c. not on the activity series.
d. a catalyst

Answer 1

a halogen

Group 17 elements are called halogens because halogen is a Greek word which means 'salt producing'. Halogens include fluorine, chlorine, bromine, iodine and astatine. They all are non-metals. They react with metals to form compounds called salts.