Yes, atomic energy was the term used up to the 50's, then nuclear energy became the normal term, it is more correct.
Nuclear energy and atomic energy are the same thing.
Atomic energy is really a misnomer for nuclear energy. It is the fissioning of the nucleus which causes energy to be released. At the atomic level we are dealing with chemical reactions, but in the early days people did talk of atomic power and atomic bombs.
Nuclear energy provides about 20 percent of US electricity, so it is useful. Atomic energy is the same thing, but is now an obsolete term, we use nuclear energy as the description now.
Nuclear energy
nuclear energy
Nuclear
Nuclear Energy
nuclear energy
Nuclear fission
It gets its energy from the atomic nucleus.
Because it comes entirely from the Atomic Nucleus.
You get nuclear energy from the binding energy (Strong Atomic Force) that holds the nucleus together.