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1900's Physics and Wave

In the Bohr's...

Question

In the Bohr's model, for unielectronic species following symbols are used.
$r_{n, z} \to$ Radius of $n^{t h}$ orbit with atomic number "z".
Calculate z in all cases.

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Solution

Radius of $n^{t h}$ orbit in Bohr's model
$r = \frac{n^{2} h^{2}}{4 π^{2} m c^{2}} \times \frac{1}{z}$ $n$ = principal quantum number ; $z$ = atomic number
$= \frac{n^{2}}{z^{2}} \times 52.49 m$

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