Atomic energy is produced when atoms of uranium235 or other fissile material split, or undergo fission. It is nothing to do with fluorescence, and I don't understand 'heat mass'
Atomic energy is converted into heat. At the atomic level, however, this heat can be viewed in other ways. It can be seen as kinetic energy, for example, or electrical energy. It is measured in electron volts, but can also be measured by temperature or speed. So a neutron produced with a lot of electron volts is called fast or hot. But the heat in the atomic reactor is the heat of fission. Fission and fusion both involve the forces that bind atoms together. It happens that the most stable atoms are iron, so anything with less mass is somewhat likely to become more stable through fission, and anything with more mass is likely to become more stable through some nuclear action that loses mass, such as fission or other decay. The increase of stability is accompanied by a decrease of energy, and that is where atomic energy comes from.
Energy has no mass.
mass defect
Depends, what do you mean "change"? Atomic mass "changes" whenever something undergoes decay or breaks apart. In this respect, atomic mass is not exactly conserved either. Rest mass gets converted to energy; e=mc^2, meaning energy is equal to mass times the speed of light squared. This energy is usually the kinetic energy of the particle that gets dislocated from the original atom.
E= M * C squared
Sure, burn it.
m=0.009106u
No rest mass - because they're energy.
No. Different elements have different atomic masses, the all protons have the same mass (ignoring the small mass loss to binding energy when bound inside an atomic nucleus).The atomic mass of an element is the weighted average of the atomic masses of all isotopes of that element. The atomic mass of an isotope of an element is the sum of the protons and neutrons in its nucleus, minus the mass loss of the protons and neutrons to binding energy, plus the mass of the electrons around the atom (but their mass is so small as to usually be negligible and is ignored).The element hydrogen has one isotope whose nucleus is just a single proton, all other elements have both protons and neutrons in their nuclei. Only for this hydrogen isotope is its atomic mass about the mass of the proton. The mass of its proton nucleus is not reduced by binding energy, as there are no other particles in the nucleus for the proton to bind to and the mass of the single electron in the atom is about 1800 times smaller than the mass of the proton making it negligible in the total atomic mass.
The answer is heat.
A. Atomic Mass B. Atomic Number C. Atomic Radius D. Ionization energy
Whatever temperature you want the mass to have, the more mass there is, the more heat energy you'll have to pump into it in order to raise it to that temperature. Or the more heat energy you'll have to pump out of it in order to cool it to that temperature.