1. A group of elements that includes the most active of the nonmetals is the a. nitrogen group.
c. noble gases.
b. alkaline earths.
d. halogens.

D. Halogens

Explanation:

All elements in these groups have 7 valence electrons, meaning their electronegativity is the highest among the elements.

introduction of a drug directly into the respiratory tract is a form of inhalation administration.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.