The noble gases are the least
of any elements on the periodic table.

the
form acidic compounds with hydrogen.

the halogens are the most reactive among all the
.

it should be all of them because it asks if you included all of those in your answer

explanation:

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

the correct answer to this question is 2