According to the CRC Handbook of Chemistry and Physics, 60th Edition: 132Xe at 26.89%. 129Xe is a close second at 26.44%.
The most abundant isotope of arsenic is arsenic-75.
There is only one abundant isotope of fluorine and that is 19FFluorine-19 is the most common isotope, its abundance is classed as 100% because no other Fluorine isotopes exist in significant quantities. It is also the only stable Fluorine isotope.
There are 9 isotopes, so there is no the isotope.
Potassium I reckon
As the atomic number of nitrogen is 7, the most abundant isotope of this atmospheric gas must have 7 neutrons (14.007 - 7 = about 7), and this will make nitrogen-14 that isotope that is most abundant.
The most abundant isotope of arsenic is arsenic-75.
Tritium is the most abundant hydrogen isotope
There are 77 Neutrons in the nucleus of one atom of Xenon
The numer of neutrons depends on the isotope, which, as you've noted, Xenon has several of. Pick one.
Xenon has a variety of isotopes, each with a different number of neutrons. The most common isotope, Xenon-132, has 77 neutrons. To calculate the number of neutrons in a xenon isotope, subtract the number of protons (which is equal to the atomic number) from the mass number of the isotope.
Xenon's, or Xe's, atomic number is 54. That means that, if it's electrically neutral, it always has 54 protons and 54 electrons. The number of neutrons in a xenon atom can differ, though, depending on the isotope. The most common isotope of xenon has 78 neutrons, but there are other isotopes with a different number of neutrons in them that are fairly common as well.
There is only one abundant isotope of fluorine and that is 19FFluorine-19 is the most common isotope, its abundance is classed as 100% because no other Fluorine isotopes exist in significant quantities. It is also the only stable Fluorine isotope.
Each isotope of an element has a different number of neutrons. Number of neutrons = Atomic mass of the isotope - Atomic number of the element The atomic number of xenon is 54. For the list of xenon isotopes see the link below.
It is not abundant anywhere.
There are 9 isotopes, so there is no the isotope.
An isotope of cobalt is used to to kill cancer cells. The isotope americium-241 is used in smoke detectors.
Potassium I reckon