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  • The ratio for the speed of the electron in the orbit of <img alt="\mathrm{He}^{+}

The ratio for the speed of the electron in the 3^{\text {rd }} orbit of \mathrm{He}^{+}to the speed of the electron in the 3^{\text {rd }} orbit of hydrogen atom will be :
 

Option: 1

1: 1


Option: 2

1: 2


Option: 3

4: 1


Option: 4

2: 1


Answers (1)

best_answer

Velocity of electron in nth  orbit is
\mathrm{V_{n}= V_{0}\left ( \frac{Z}{n} \right )}
For  \mathrm{He^{+},}
\mathrm{V_{1}= V_{0}\left ( \frac{2}{3} \right )\; \rightarrow (1)}

For Hydrogen atom ,
\mathrm{V_{2}= V_{0}\left ( \frac{1}{3} \right )\; \rightarrow (2)}

\mathrm{\frac{V_{1}}{V_{2}}= \frac{2}{1}}

The correct option is (4)
 

Posted by

Gaurav

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