The atomic mass of a nitrogen atom (N) is 14.0 u, while that of an oxygen atom (O) is 16.0 u. Three diatomic gases have the same temperature: nitrogen (N2), oxygen (O2), and nitric oxide (NO). Rank these gases in ascending order (smallest first), according to the values of their translational rms speeds.

Question

A) N2, O2, NO

B) N2, NO, O2

C) O2, N2, NO

D) NO, N2, O2

Please explain step by step.
O2, NO, N2