Here's how to determine the number of neutrons in an atom of molybdenum-96 (Mo-96):

* Atomic Number: Molybdenum (Mo) has an atomic number of 42. This means it has 42 protons.

* Mass Number: The "96" in Mo-96 represents the mass number. The mass number is the total number of protons and neutrons in the nucleus.

* Calculating Neutrons:

* Neutrons = Mass Number - Atomic Number

* Neutrons = 96 - 42 = 54

Therefore, an atom of molybdenum-96 has 54 neutrons.