Consider the elements in the periodic table. as we move to the far right, the purple column is made up of that are question 12 options: a gases; nonreactive b metals; nonreactive c metalloids; reactive d gases; highly reactive

Option (a) is the correct answer.

Explanation:

As we move to the far right in the periodic table, the purple column represents noble gases.  

It is known that noble gases have completely filled shells and hence they are non reactive in nature.

Therefore, we can conclude that as we move to the far right, the purple column is made up of gases that are non-reactive.