The radius of the first Bohr's orbit of the h | vedclass

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(D) The radius of the $n^{th}$ Bohr orbit is given by the formula: $r_n = \frac{n^2 	imes 0.529 \mathring{A}}{Z}$.For the hydrogen atom,the atomic nu

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$0.53$

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(D) The radius of the $n^{th}$ Bohr orbit is given by the formula: $r_n = \frac{n^2 	imes 0.529 \mathring{A}}{Z}$.For the hydrogen atom,the atomic number $Z = 1$ and for the first orbit,$n = 1$.Substituting these values: $r_1 = \frac{1^2 	imes 0.529 \mathring{A}}{1} = 0.529 \mathring{A}$.Rounding to two decimal places,we get $0.53 \mathring{A}$.Therefore,the correct option is $(d)$.

The radius of the first Bohr's orbit of the hydrogen atom is ............. $\mathring{A}$.

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