The nuclear binding energy of an atom can be calculated using Einstein's famous equation, E=mc², where:

* E is the binding energy (in Joules)

* m is the mass defect (in kilograms)

* c is the speed of light in a vacuum (approximately 299,792,458 m/s)

Therefore, the nuclear binding energy of an atom with a mass defect of x kg is:

E = x kg * (299,792,458 m/s)²

This will give you the binding energy in Joules. You can convert it to other energy units like MeV (megaelectronvolts) if needed, using the following conversion:

1 MeV = 1.602 x 10⁻¹³ J