It forms helium, and possibly heavier elements as well.
Nuclear reactions convert very small amounts of matter into significant amounts of energy.
A star.
splitting a nucleus into two nuclei
All the above
Photons, but energy would be a more common answer.
nuclear fusion
nuclear fusion
nuclear fusion
A nuclear reaction - either fusion or fission - is required to turn matter into energy.
Nuclear fusion.
Yes. In nuclear processes like fusion and fission, some matter is converted into energy.
Nuclear reactions convert very small amounts of matter into significant amounts of energy.
Phase change - melting, evaporation, Nuclear fusion or fission.
Collapsing matter and gasses get denser and denser until nuclear fusion and fission start.
Nuclear fusion, turning hydrogen into helium and burnong both.
Nuclear fusion, of lighter elements onto heavier elements.
Nuclear matter! including mostly of uranium, used to create neuclear fusion, a advanced chamical reaction that putes out a lot of energy