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Multi-Electron Configurations and Orbital Diagrams

Energy of ele...

Question

Energy of electron in second orbit of H-atom is :

A

-13.6eV

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B

-3.4eV

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C

-1.51eV

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D

-0.85eV

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Solution

The correct option is A -3.4eV
The energy of an electron in the $n^{t h}$ orbit of $H$ -atom is given by,

$E_{n} = - 13.6 \times \frac{1}{n^{2}} e V$

For second orbit. $n = 2$

$\Rightarrow E_{n} = \frac{- 13.6}{4}$

$\Rightarrow E_{n} = - 3.4 e V$

Therefore, the option is B.

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