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A proton and electron are initially at infinite separation. Now the proton and the election approach each other and finally they form an hydrogen atom of ground state. Then the total energy released in this process is.

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10.2 eV

zero

13.6 eV

12.59 eV

answer is C.

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Detailed Solution

Initial energy stored in the proton-electron system is zero. i.e., $V_{i} = 0, V_{f} =$ energy of the electron in the ground state of hydrogen atom =-13.6 eV.
$∴ Energy released = V_{i} - V_{f} = 13.6 e V$

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