Question

patterns of reactivity quick check
which feature is unique to group 18 nonmetals? (1 point)
they have more exceptions to reactivity rules.
they follow a different pattern of reactivity.
they are very nonreactive.
they are very reactive.

Explanation:

Group 18 nonmetals (noble gases) have a full valence shell of electrons. This electron configuration makes them very stable. As a result, they have little tendency to gain, lose, or share electrons. This stability leads to them being very nonreactive under normal conditions.

• The first option about more exceptions to reactivity rules is not a key unique feature.
• They don't follow a completely different pattern in a sense that is more fundamental than their non - reactivity. Other groups have their own patterns too.
• They are not very reactive as their electron configuration opposes reactions.

Answer:

They are very nonreactive.