what is neclear fusion?

Question

i need it for a hw assignment

Answer 1

Nuclear fusion is what happens in our sun where the element hydrogen is converted into helium. Nuclear fusion is not limited just to hydrogen and helium though :: if temperature and pressure are high enough, other elements will convert into others.

Answer 2

Nuclear fusion is the process of smashing two small atoms together to make a bigger atom. Theoretically, this could be the next big source of energy, but we don't know how to do it at reasonable temperatures and pressures. This would be called "cold fusion". The sun is powered by nuclear fusion, but we can't reproduce the conditions inside the sun on earth.

Answer 3

In physics and nuclear chemistry, nuclear fusion is the process by which multiple nuclei join together to form a heavier nucleus. It is accompanied by the release or absorption of energy. Iron and nickel nuclei have the largest binding energies per nucleon of all nuclei and therefore are the most stable. The fusion of two nuclei lighter than iron or nickel generally releases energy while the fusion of nuclei heavier than iron or nickel absorbs energy; vice-versa for the reverse process, nuclear fission.

In astrophysics, fusion reactions power the stars and produce all but the lightest elements. Whereas the fusion of light elements in the stars releases energy, production of the heaviest elements absorbs energy, so it can only take place in the extremely high-energy conditions of supernova explosions. Fusion of light elements releases energy. When the reaction is a sustained uncontrolled chain, it results in a thermonuclear explosion like in a hydrogen bomb. Research is being conducted with the goal of achieving controlled fusion and making fusion power a viable means of producing electricity. It is often claimed that if successful, it may provide clean, cheap & abundant energy for the world unlike fission power.

It takes considerable energy to force nuclei to fuse, even those of the lightest element, hydrogen. But the fusion of lighter nuclei, creating a heavier nucleus and a free neutron, will generally release more energy than it took to force them together — an exothermic process that can produce self-sustaining reactions.

The energy released in most nuclear reactions is much larger than that in chemical reactions, because the binding energy that holds a nucleus together is far greater than the energy that holds electrons to a nucleus. For example, the ionization energy gained by adding an electron to a hydrogen nucleus is 13.6 electron volts — less than one-millionth of the 17 MeV released in the D-T (deuterium-tritium) reaction shown to the top right.

Building upon the nuclear transmutation experiments of Ernest Rutherford done a few years earlier, fusion of light nuclei (hydrogen isotopes) was first observed by Mark Oliphant in 1932, and the steps of the main cycle of nuclear fusion in stars were subsequently worked out by Hans Bethe throughout the remainder of that decade.

Answer 4

Making big atoms out of little atoms. It's what powers the sun and hydrogen bombs. A bunch of countries are getting together to build ITER. A fusion research reactor. If it goes well, it will lead to fusion power plants.

Answer 5

i think you mean nUclear...
which is when you "Fuse" two or more nuclei together to make a heavier nucleas. Why would someone do this? well, sub-atomic particles give off radiation, or ENERGY...nuclear fusion can also energy to be obsorbed. It is the goal of scientists to make this happen at room temperature or lower. Right now this process is very hot and dangerous!

Answer 6

A Misspelled Word....lol