Final answer:
Radon (Rn) is an element in the noble gas family.
Step-by-step explanation:
The element in the noble gas family is Radon (Rn). Noble gases are a group of elements found in Group 18 of the periodic table, also known as the Group 0 elements. They are characterized by their low reactivity and full valence electron shells. Radon is a colorless and odorless gas that is radioactive and can be found in small quantities in the air.
Learn more about Noble gases