Energy of electron of hydrogen atom in second Bohr orbit is - Vidyadip

MCQ

Energy of electron of hydrogen atom in second Bohr orbit is

✓
$ - 5.44 \times {10^{ - 19}}J$
B
$ - 5.44 \times {10^{ - 19}}\,kJ$
C
$ - 5.44 \times {10^{ - 19}}\,cal$
D
$ - 5.44 \times {10^{ - 19}}\,eV$

✓

Answer

Correct option: A.

$ - 5.44 \times {10^{ - 19}}J$

a
(a) $E = - \frac{{2.172 \times {{10}^{ - 18}}}}{{{n^2}}} = \frac{{ - 2.172 \times {{10}^{ - 18}}}}{{{2^2}}}$

$ = - 5.42 \times {10^{ - 19}}J$.

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