Question 148: Atoms & Nuclei

Question

The radius of electron's second stationary orbit in Bohr's atom is R. The radius of 3rd orbit will be

Accepted Answer

$r \propto \frac{n^{2}}{Z}$
$$
\begin{aligned}
& \frac{r_{2 { nd }}}{r_{3 \mathrm{rd}}}=\left(\frac{n_{2}}{n_{3}}ight)^{2} \\
& \Rightarrow \frac{R}{r_{3 r d}}=\left(\frac{2}{3}ight)^{2} \\
& \Rightarrow r_{3 \mathrm{rd}}=\frac{9}{4} R \\
& =2.25 R
\end{aligned}
$$

Answer

2.25R

Answer

$3 \mathrm{R}$

Answer

$\frac{\mathrm{R}}{3}$

Answer

$9 \mathrm{R}$

Atoms & Nuclei

The radius of electron's second stationary orbit in Bohr's atom is R. The radius of 3rd orbit will be

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