Nuclear energy is a form of energy released from the nucleus, the core of atoms, made up of [[1]] and [[2]].

Nuclear energy is a form of energy released from the nucleus, the core of atoms, made up of protons and neutrons.

This source of energy can be produced in two ways: Fission, which occurs when atom nuclei split into several pieces, and fusion, which occurs when nuclei combine. 

Nuclear fusion technology is still in the research and development stage, whereas nuclear fission energy is currently used to create electricity throughout the world.