The atomic number of Xenon is 54. This means that a neutral atom of xenon will have 54 protons and 54 electrons. The number of neutrons can be found by subtracting the atomic number from the mass number. The mass number of xenon is 131, so the number of neutrons is 131 - 54 = 77.

Therefore, a neutral atom of xenon has 54 protons, 77 neutrons, and 54 electrons.