7
There are 77 Neutrons in the nucleus of one atom of Xenon
A Xenon neutron has between 70 to 82 neutrons.
Helium has two neutrons and two protons in its nucleus.
18
2
30 neutrons in the most stable isotope of iron (Fe-56).
An oxygen atom typically has 8 protons and 8 neutrons in its nucleus.
This depends on the individual Atom.
69
20 for the stable atom
7
14