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Write the expression for the radius of nth orbit. Give the meaning of symbols used.

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Write the expression for the radius of nth orbit. Give the meaning of symbols used.

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where ‘r’ is radius, n is principal Quantum number, h is Planck’s constant, m is the mass of electron, Z atomic number and e is quantised unit of charge and ɛ0 absolute permittivity for air or free space. 

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