The approximate radius of a H−atom is 0.05nm, and that of proton is 1.5×10−15. Assuming both the hydrogen 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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Solution
Space occupied can be expressed in terms of volume of the proton.
Volume of the proton= 43Π(1.5×10−15)3
Total volume of H−atom= 43Π(0.05×10−9)3
∴ Space occupied= Volume of protonTotal volume of atom