Energy of an electron in the second orbit of hydrogen atom is E_2. The energy of electron in the third orbit of He^+will be

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Correct answer: B. (b) Energy of an electron in n^ th orbit of hydrogen atom is E= -13.6Z^2n^2 eV For n=2 ,Z=1 E_2= -13.64 eV … . (i ) For n=3 ,Z=2 E_3=- 13.6 49 … . ( ii ) Dividing eq (ii) by (i), E_3E_2= 4 49 1= 169 ∴E_3= 169E_2

$Energy of an electron in the second orbit of hydrogen atom is E_{2} . The energy of electron in the third orbit of He^{+} will be$

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