According to Bohr's atomic theory :-A. Kineti | vedclass

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(D) According to Bohr's theory :$A$. $KE = 13.6 \frac{Z^{2}}{n^{2}} \ eV/atom \Rightarrow KE \propto \frac{Z^{2}}{n^{2}}$ (Correct)$B$. Speed of $e^{-

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$A$ and $D$ only

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(D) According to Bohr's theory :$A$. $KE = 13.6 \frac{Z^{2}}{n^{2}} \ eV/atom \Rightarrow KE \propto \frac{Z^{2}}{n^{2}}$ (Correct)$B$. Speed of $e^{-} \propto \frac{Z}{n} \Rightarrow v 	imes n \propto Z$ (Incorrect)$C$. Frequency of revolution of $e^{-} = \frac{v}{2 \pi r}$. Since $v \propto \frac{Z}{n}$ and $r \propto \frac{n^{2}}{Z}$,then Frequency $\propto \frac{Z/n}{n^{2}/Z} = \frac{Z^{2}}{n^{3}}$ (Incorrect)$D$. $F = \frac{kZe^{2}}{r^{2}}$. Since $r \propto \frac{n^{2}}{Z}$,then $F \propto \frac{Z}{(n^{2}/Z)^{2}} = \frac{Z^{3}}{n^{4}}$ (Correct)Thus,statements $A$ and $D$ are correct.

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