Question

The particle not present in an ordinary hydrogen atom is

Answer 1

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nucleus is the subatomic particle that which is not present in an ordinary hydrogen atom

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Answer 2

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A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force. Atomic hydrogen constitutes about 75% of the baryonic mass of the universe.
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