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Nascent Hydrogen. The hydrogen gas, which is just liberated as a result of a chemical is called nascent hydrogen or newly born hydrogen. It is obtained by passing dihydrogen gas at atmospheric pressure through an electric arc between two tungsten rods. The electric arc maintains a temperature around 4000 - 4500Â°C.
That is to say if a protostar has at least 0.08 times the mass of our sun and has a temperature of at least 107 K, hydrogen fusion can begin in it and it will become a star. Hydrogen fusion is the longest stage in an active stars life and so is considered the main sequence of a star.1]. The other process through which hydrogen can fuse into helium in a star is called the carbon cycle. This process will occur if the star has carbon present with in it and if the stars temperature is 2x107 K or greater. Equations (6)-(11) outline the series of reactions that occur in the carbon cycle.