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CGP EDU Academic Team
Published on: August 14, 2026
The approximate radius of a H-atom is 0.05 nm, and that of proton is 1.5 × 10 –15 m. Assuming both the hydrogen atom and the proton to be spherical, calculate fraction of the space in an atom of hydrogen that is occupied by the nucleus.
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= 
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= 2.7 × 10 –14
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