Identify the gas particle that travels the slowest. identify the gas particle that travels the slowest. ar h2 xe cl2 f2

The gas particle that will travel the slowest is the gas particle that has the highest mass. From the question given, Argon has the mass of 40, Hydrogen mass is 1, Xenon mass is 131, Chlorine mass is 35.5 and fluorine mass is 19.

From these mass values, it can be seen that the xenon particle is the one that will travel at the slowest rate.