How do atoms release energy and how do they gain energy

1.	How do atoms release energy and how do they gain energy
Answer» Nuclear energy is the energy released when the NUCLEI (nuclei is the plural of NUCLEUS) of atoms split or are fused. You KNOW the nucleus is MADE up of protons and neutrons. Nuclear forces hold all of the pieces together. Fusion is when two nuclei come together. When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. ... Electrons therefore have to JUMP around within the atom as they either gain or lose energy. hopr helped..

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