Which of the following noble gases have been observed to form compounds?
A)He and Ar
B)Kr and Xe
C)Xe
D)Ar,Kr,and Xe
E)The noble gases never form compounds since they have filled outer shells.

Question

Quizplus · Accepted Answer

Ar, Kr, and Xe are the only noble gases that have been observed to form compounds. While He and Ne have the most stable outer shell configurations, they lack the energy required to form stable compounds with other elements. Therefore, the noble gases' filled outer shells do not guarantee that they will not form compounds under certain conditions.

Which of the Following Noble Gases Have Been Observed to Form