That varies depending on the element and the isotope. An element is defined by its number of protons. This is called the "atomic number" of an element.
It would tell you how many neutrons make up the Nucleus of the atom.
A typical atom of iodine contains 74 neutrons.
45 neutrons
Neutrons and Protons make up the nucleus. Electrons orbit an atom.
There are 54 neutrons in an atom of molybdenum-96. The atomic number is 42, so there are 42 protons. The neutrons make up the rest of the 96. 96-42=54.
A stable atom of Zinc (Zn) typically has 34 neutrons.
The atomic weight minus the number of protons = the atom's neutrons.
52 neutrons.
A typical atom of iodine contains 74 neutrons.
A stable magnesium atom has 12, 13 or 14 neutrons. The atom with 12 neutrons is the most common one.
When an atom of an element has a different number of neutrons.
How many neutrons would it have if it had 11 neutrons? 11.