Samples of neon gas and of krypton gas, with identical numbers of moles, pressures and volumes, are also held at the same temperature. What can be said of the particles of neon gas when compared to the particles of krypton gas?

Answer: the neon gas will possess a greater kinetic energy

Explanation:

The neon gas is smaller in mass than the krypton gas. At the came temperature and pressure, the has with a lesser mass will have greater kinetic energy and move faster than the gas with a greater mass. This follows from Graham's law of diffusion in gasses.