Question

why are noble gases the most stable elements? they have full valence shells. they have only one valence electron and are very reactive. they have only one valence electron and are not reactive. they are very reactive.

Explanation:

Noble gases are stable because their outermost electron shells, or valence shells, are full. This full - shell configuration gives them a low tendency to gain, lose, or share electrons, making them unreactive.

Answer:

They have full valence shells.