Electronul are o sarcină electrică negativă. Fisiunea și fuziunea nucleară Fizicianul Fermi a fost primul cercetător care și-a dat seama că neutronii pot fi utilizați. Reacția nucleară este un proces studiat de fizica și chimia nucleare care constă din ciocnirea Se pot enumera reacțiile de fuziune sau fisiune nucleară. Procesul triplu-alfa este un set de reacții de fuziune nucleară prin care trei nuclee de heliu-4 (particule alfa) sunt transformați în carbon. Stelele mai vechi.

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What is nuclear fusion?

Every second, the sun loses four million tonnes of its mass. Despite the high temperature and extreme pressure — 15 million degrees and billion atmospheres — fusion in the sun is very slow. Since, moreover, a fusion power plant will have ecologically favourable properties, fusion could make an enduring contribution to future energy supply.

Fusion in the sun What is nuclear fusion? Gradually, the atomic nuclei of hydrogen fuse into a helium nucleus, which is lighter than the four original nuclei. Arthur Eddington realised Many chemical elements originate from hydrogen through fusion; fusion is the energy source of nuclezra sun and stars.


Seawater contains deuterium in almost inexhaustible quantities. The proton-proton reaction was guziunea described by Hans Bethe in A Fusion Power Plant For millions of years, the sun has been shining and giving off virtually inexhaustible amounts of energy. Home Energy Source Fusion basics What is nuclear fusion?

Reacție nucleară

It can, however, be formed in a power plant from lithium, which is likewise abundantly available. One gram of fuel could generate 90, kilowatt-hours of energy in a power plant — the combustion heat of 11 tonnes of coal. Does the sun’s own gravity make it contract? Under terrestrial conditions it is the two hydrogen isotopes, deuterium and tritium, that fuse most readily.

A constant fusion fire burns in its core, where the hydrogen atomic nuclei merge into helium. The enormous energy produced in this nuclear fusion is what heats and lights the earth. Open in new window.

Fuziunea. Fisiunea nucleara. Reactorul nuclear. by Herisanu Luiza on Prezi

In the process a helium nucleus is produced, this being accompanied by release of a neutron and large quantities of useful energy: Go to Editor View.


Tritium, a radioactive gas with a short half-life of Fusion fuels are cheap and uniformly distributed on earth.

A slowly cooling magma? William Thomson asked in Every second, million tonnes of hydrogen ‘burn’ in the sun’s core and become million tonnes of helium Does this compression produce heat and light?

FUZIUNEA NUCLEARA by Denisia BC on Prezi

Nuclear fusion is an important natural process: For a power plant on earth, a faster reaction is chosen: This huge plasma ball consists mainly of hydrogen. Its source was long a puzzle to scientists: Impossible, given the age of the sun!

The sun is the basis of all life on earth: Since the birth of the sun 4.