Thread: Hydrogen
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AntonioLao
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05-02-2005, 08:50 PM

GUILLE,

Hydrogen is the 1st atom that was made during the nucleosynthesis formation of the early universe. A few moments after BB, the universe is a bowl of soup containing quarks and leptons. The temperature drops, then the quarks began to form into Hydrogen nuclei (protons). Then the temperature drops, the Hydrogen nuclei began to form Hydrogen atoms. When Hydrogen atoms attracted each other by gravity, they began to form stellar clouds. when these clouds increase its density by gravity, the thermonuclear fusion process begins and a star is born. During the lifetime of the first stars, other nuclei of elements such as Helium, Carbon, Oxygen, Nitrogen, etc were formed. The stars died by nova or supernova. The heavier nuclei formed atoms with the lightest leptons (electrons) and clouds of planetesimals were formed and the planetesimal collided and formed planets when they start to orbit around another star.
  
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