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The atomic number of Xenon is 54, so there are 54 subatomic particles inside the nucleus of a Xenon atom.

The mass number of Xenon is 131. Since the atomic number is 54, the difference between the mass number and the atomic number gives the number of neutrons in the nucleus. Therefore, there are 131 - 54 = 77 subatomic particles outside the nucleus in a Xenon atom.

what about th outside

Apologies for the confusion in my previous response. Let me clarify the number of subatomic particles outside the nucleus in a Xenon atom.

To determine the number of subatomic particles outside the nucleus, we need to subtract the protons from the total number of subatomic particles.

The atomic number of Xenon is 54, which corresponds to the number of protons. The mass number is 131, which represents the sum of protons and neutrons. Therefore, to find the number of subatomic particles outside the nucleus, we subtract the atomic number from the mass number.

131 - 54 = 77

So, there are 77 subatomic particles outside the nucleus in a Xenon atom.