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Find the sum of the kinetic and the pote...

Find the sum of the kinetic and the potential energies of an electron in the first Bohr orbit. Explain the meaning of the sign of the total energy

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`E= K+U= (mv^(2))/(2)- (e^(2))/(4piepsilon_(0)(a_(0)))= -13.6eV`
The minus sign means that the formation of a hydrogen atom from a free proton and an electron is accompanied by the liberation of energy equal to 13.6 eV.
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