Answer: B) Krypton is a noble gas and has a full valence electron shell, is chemically non-reactive, and located in group 8A
Explanation: krypton are element of group 18(VIIIA) and are refer to as noble gases because they often dont react with other gases. They are in active gases usually not found in large quantity like other elements such as Nitrogen,oxygen...It has six Isotopes/other forms and can be used for filling lamps.
