Question

multiple - choice question noble gases are... metals. radioactive. very reactive. unreactive.

Explanation:

Noble gases (e.g., helium, neon, argon) have full valence electron shells. This electron configuration makes them stable and less likely to gain, lose, or share electrons. Metals conduct electricity and heat (noble gases are gases at room - temperature and poor conductors). Some noble gases like radon are radioactive, but not all (e.g., helium, neon are not). Their full valence shells mean they are not very reactive.

Answer:

unreactive.