Which feature is unique to Group 18 nonmetals?(1 point)

They have more exceptions to reactivity rules.
They are very nonreactive.
They follow a different pattern of reactivity.
They are very reactive.

1 answer

The feature that is unique to Group 18 nonmetals is: They are very nonreactive. Group 18, also known as the noble gases, is characterized by their lack of reactivity due to having a complete valence shell of electrons.