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NEET Physics Nuclei Questions Solved

If the atom ${}_{100}^{257}{Fm}$ follows the Bohr model and the radius of ${}_{100}^{257}{Fm}$ is n times the Bohr radius, then find n

(a) 100 (b) 200
(c) 4 (d) $\frac{1}{4}$

(d) $r_{m} = \frac{m^{2}}{Z} (0.53 \overset{0}{A}) = (n \times 0.53 \overset{0}{A}) \Rightarrow \frac{m^{2}}{Z} = n$

m = 5 for ${}_{100}^{257}{Fm}$ (the outermost shell)

and z = 100 $\Rightarrow n = \frac{5^{2}}{100} = \frac{1}{4}$

Difficulty Level:

(1)
8%
(2)
29%
(3)
15%
(4)
50%

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