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Q.

The radius of the first permitted Bohr orbit for the electron, in a hydrogen atom equals 0.51 Å and its ground state energy equals –13.6 eV. if the electron in the hydrogen atom is replaced by muon (μ-) [charge same as electron and mass 207 me], the first Bohr radius and ground state energy will be :

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a

0.53 × 10–13m, –3.6 eV

b

2.56 × 10–13m, –13.6 eV

c

2.56 × 10–13m, –2.8 eV

d

25.6 × 10–13m, –2.8 eV

answer is C.

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Detailed Solution

r∝1m ; E∝m

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