1.

The gravitational force between a H-atom and another particle of mass m will be given by Newton's law F = G (M.m)/(r^(2)), where r is in km and

Answer»

`M=m_"PROTON"+m_"electron"`
`M=m_"proton"+m_"electron"-B/c^2 ` (B=13.6 EV)
M is not related to the mass of hydrogen atom
`M=m_"proton"+m_"electron" -(|V|)/c^2`(|V|=magnitudeof the POTENTIAL energy of electron in the H-atom )

SOLUTION :Here, M=Mass of Hydrogen atom
`=m_"proton"+m_"electron"-B/C^2`
where B is binding energy of H-atom which is 13.6 eV.


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