Question

what is unique about the noble gas elements? they form diatomic molecules they are unreactive they are highly reactive with water they only form compounds with other noble gases

Explanation:

Noble gases have a full - outer electron shell, which makes them very stable and unreactive under normal conditions. They do not form diatomic molecules like some other gases, are not highly reactive with water, and do not only form compounds with other noble gases (though some compounds with highly electronegative elements can be formed under extreme conditions).

Answer:

They are unreactive