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Characteristics of Bohr's Atomic Model

Question

According to Bohr model, the diameter of first orbit of hydrogen atom will be
$1 A^{\circ}$
$0.529 A^{\circ}$
$2.25 A^{\circ}$
$0.725 A^{\circ}$

A

0.725 A^{\circ}

B

0.529 A^{\circ}

C

2.25 A^{\circ}

D

1 A^{\circ}

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Solution

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The radius of first orbit of hydrogen atom is:
$r = \frac{n^{2} h^{2} ϵ_{0}}{π m e^{2}}$ ........................(since, n = 1)

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