NEET 2023 — Physics solution

NEET2023Physics

The radius of inner most orbit of hydrogen atom is $5.3 \times 1 0^{- 11}$ m. What is the radius of third allowed orbit of hydrogen atom?

Solution

Bohr radius: $r_{n} = n^{2} r_{1}$ for hydrogen ( $Z = 1$ ).

$r_{1} = 0.53$ Å, so $r_{3} = 9 \times 0.53 = 4.77$ Å.

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