What two types of hydrogen are formed to make helium?

This is a question that is going to be on my test tomorrow so I'd really appreciate your help!!!! God Bless!

Update:

Good answer but is it maybe Deuterium atom and tritium atom?

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  • Anonymous
    1 decade ago
    Favorite Answer

    Light hydrogen is not formed in the interior of stars, but it makes up the bulk of all stars. However, during the proton-proton fusion process that predominantly powers all stars less than about 1.5 times the Sun's mass, two nuclei of light, or normal hydrogen fuse together to form nuclei of deuterium, or heavy hydrogen. Deuterium consists of a proton, a neutron and an electron. Normal hydrogen is simply a proton circled by one electron. Chemically, it acts like normal hydrogen, but it's twice as heavy. In the second step of the proton-proton chain, each deuterium nucleus, or deuteron, captures another proton and becomes a nucleus of light helium. These consist of two protons, one neutron and two electrons. Then two nuclei of light helium fuse together to form a nucleus of normal helium, ejecting two excess protons which are simply nuclei of light hydrogen. Normal helium atoms have two protons, two neutrons and two electrons. Along the way, heat, gamma rays, positrons, which are a form of anti-matter and neutrinos are emitted as a byproduct. The heat and gamma rays both support the star against it's own gravity and provide heat and light to it's planets. There is also another isotope of hydrogen called tritium. Each atom of tritium has one proton, two neutrons and one electron. A tritium nucleus can fuse with a deuterium nucleus or another tritium nucleus to form a nucleus of normal helium in a single step. Both deuterium and tritium are rare in the universe and do not contribute much to a star's energy output. In hydrogen bombs, tritium is used to power the fusion stage of a nuclear explosion because it makes very powerful and lightweight nuclear bombs possible, and the fusion reaction releases an intense and very lethal surge of neutrons. Every time a pair of tritium nuclei or a deuterium and a tritium nucleus fuse, free neutrons are released instead of excess protons. Tritium is produced artificially under laboratory conditions because it's also radioactive. It decays rapidly with a half-life of about 12 years.

  • 1 decade ago

    Deuterium and tritium are fusable into Helium.

    They are both forms of hydrogen, but have extra neutrons.

    Look them up in wikipedia for more details.

    Also look up Nuclear Fusion in wiki.

    Sorry the links aren't working at the moment, otherwise I would provide them If you don't know about wiki, then do a yahoo or google search for wikipedia then take it from there.

  • 1 decade ago

    same type of hydrogen atoms fuse together to form helium

    But 4hdrogen atoms are required to form 1helium atom and to start the fusion reaction,,millions of degree temperature is required.

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