* Isotopes are atoms of the same element that have the same number of protons (atomic number) but different numbers of neutrons. This difference in neutrons affects the atomic mass.
* Mass number is the total number of protons and neutrons in an atom's nucleus.
Therefore, there's no single "xenon isotope mass number." Here are some common xenon isotopes and their mass numbers:
* Xenon-129 (¹²⁹Xe): Mass number = 129
* Xenon-131 (¹³¹Xe): Mass number = 131
* Xenon-132 (¹³²Xe): Mass number = 132
* Xenon-136 (¹³⁶Xe): Mass number = 136
You can find a complete list of xenon isotopes and their properties in a periodic table or a reliable scientific resource.
