It all start with big bang, big bang is the one of blast of some atoms.the universe was in state that is very hot and expand quickly.This rapid expansion cause the 'Universe' to cool as result it continually expand.The big bang occurred in 13.75 billion year ago.that is the star of universe. After that Universe get cool and all of energy converting into sub atom including protons, neutrons and electrons
While protons and neutrons combined to form the first atomic nuclei only a few minutes after the Big Bang
it would take thousands of years for electrons to combine with them and create electrically neutral atoms.The first element produced was hydrogen, along with traces of helium and lithium. Giant clouds of these primordial elements would coalesce through gravity to form stars and galaxies, and theheavier elements would be synthesized either within stars or during supernovae.
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