The radius of fifth orbit of the is _______ . Take: radius of hydrogen atom . [2023]

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Solution

Q.
The radius of fifth orbit of the ${Li}^{+ +}$ is _______ $\times 10^{- 12} m$ .

Take: radius of hydrogen atom $= 0.51 Å$ . [2023]

Ans.
(425)

$r_{n} = r_{0} \frac{n^{2}}{Z} \Rightarrow r_{n} = 0.51 \times \frac{25}{3} Å = 4.25 \times 10^{- 10} m$

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