Question

1. why are noble gases generally unreactive? a) they have high atomic radii b) their outer electron shells are full c) they have low ionization energies d) they have very low atomic mass

Explanation:

Noble gases are unreactive because their outer - electron shells are full, which gives them a stable electron configuration and makes them less likely to gain, lose, or share electrons to form chemical bonds. High atomic radii, low ionization energies, and low atomic mass are not the reasons for their general unreactivity.

Answer:

C. Their outer electron shells are full