• # question_answer The energy of an electron in the first Bohr orbit of $H$atom is $-13.6eV$. The possible energy value(s) of the excited state(s) for electrons in Bohr orbits to hydrogen is(are) [IIT 1998; Orissa JEE 2005] A)                 $-3.4eV$           B)                 $-4.2eV$ C)                 $-6.8eV$ D)                 $+6.8eV$

Values of energy in the excited state $=-\frac{13.6}{{{n}^{2}}}eV$ $=\frac{-13.6}{4}=-3.4\,eV$in which $n=2,\,3,\,4$etc.