At these temperatures, all molecules dissociate into atoms, and the atoms ionize, forming plasma. For a fusion reaction to occur it is necessary to bring the nuclei so close together that nuclear forces become important and "glue" the nuclei together. If light nuclei are forced together, they will fuse with a yield of energy because the mass of the combination will be less than the sum of the masses of the individual nuclei. Fusion reactions power the Sun and other stars. The energy released is related to Einstein's famous equation, E=mc 2. Electrons are ignored. The energy from the Sun - both heat and light energy - originates from a nuclear fusion process that is occurring inside the core of the Sun.The specific type of fusion that occurs inside of the Sun is known as proton-proton fusion.. Balancing Nuclear Equations Name: Period: There are two types of nuclear reactions: Fission, where a nucleus breaks into two or more pieces, and fusion where two or more nuclei combine to form a new element. Nuclear reactions also follow conservation laws, and they are balanced in two ways: The sum of the mass numbers of the reactants equals the sum of the mass numbers of the products. Fusion is the reverse process of nuclear fission. In nuclear physics, nuclear fusion is a nuclear reaction in which two or more atomic nuclei collide at a very high energy and fuse together into a new nucleus, e.g. Fusion releases energy. Example 21.6.3 and its corresponding exercise demonstrate the enormous amounts of energy produced by nuclear fission and fusion reactions. helium. It's the same type of reaction that powers hydrogen bombs and the sun. In a fusion reactor, hydrogen atoms come together to form helium atoms, neutrons and vast amounts of energy. As the nuclei of two light atoms are brought closer to each other, they become increasingly destabilized, due to the In nuclear reactions, only the nucleus is involved. A balanced nuclear reaction equation indicates that there is a rearrangement during a nuclear reaction, but of subatomic particles rather than atoms. Nuclear Reactors. Each of the elements involved in the reaction is identified by the chemical symbol. Nuclear fusion is a process in which two or more atomic nuclei collide at a very high speed and join to form a new type of atomic nucleus that has more mass than any of the starting nuclei. In order to write an equation for such a reaction, we must first establish some basic rules. In fact, fusion reactions are the power sources for all stars, including our sun. Useful fusion reactions require very high temperatures for their initiation—about 15,000,000 K or more. These conditions occur in an extremely large number of locations throughout the universe—stars are powered by fusion. The deuterium-tritium reaction releases energy explosively. Fusion Reactions The concept of nuclear fusion has been described in Chapter 12. Nuclear fusion - Nuclear fusion - Fusion reactions in stars: Fusion reactions are the primary energy source of stars and the mechanism for the nucleosynthesis of the light elements. This would be a cleaner, safer, more efficient and more abundant source of power than nuclear fission. It is summarized in Figure 14-1, which is analogous to Figure 13-2 for nuclear fission.