Xenon has eight stable naturally occuring isotopes. Besides these stable forms, there are over 40 unstable isotopes that have been studied.
None of the isotopes of xenon ordinarily found in nature is radioactive. Like all elements, xenon has synthetic radioactive isotopes.
Some isotopes of xenon do undergo radioactive decay to caesium.
There are 40 unstable isotopes (an element contained in xenon) that undergo radioactive decay.
To accommodate the isotopes of Xenon, it is 131.29 + 6*18.998
The numer of neutrons depends on the isotope, which, as you've noted, Xenon has several of. Pick one.
None of the isotopes of xenon ordinarily found in nature is radioactive. Like all elements, xenon has synthetic radioactive isotopes.
Some isotopes of xenon do undergo radioactive decay to caesium.
Caesium and Xenon, with 36 isotopes each
There are 40 unstable isotopes (an element contained in xenon) that undergo radioactive decay.
It has mostly stable isotopes.
Xe has 77 neutrons.
To accommodate the isotopes of Xenon, it is 131.29 + 6*18.998
Most of the isotopes of xenon are stable and even those that do decay, have half-lives of more than a quadrillion years!
The numer of neutrons depends on the isotope, which, as you've noted, Xenon has several of. Pick one.
Any other gas.
Xe-n where n is a number which represents the number of nucleons in the atom of the isotope. n can vary between 124 and 136.
None! Xenon and oxygen are both elements, and by definition, no element contains any amount of any other element.