The nuclear binding energy of an atom can be calculated using Einstein's famous equation, E=mc², where E is energy, m is mass, and c is the speed of light.
The mass defect of the atom is given as 5.0446x10^-29 kg. This is the difference between the mass of the atom and the sum of the masses of its constituent particles (protons, neutrons, and electrons).
Using E=mc², we can calculate the nuclear binding energy of the atom as follows:
E = (5.0446x10^-29 kg) x (3.00x10^8 m/s)^2
E = 4.54x10^-12 J
Therefore, the nuclear binding energy of the atom is 4.54x10^-12 J.