# NEET Physics Atoms Questions Solved

In the study of Geiger-Marsdon experiment on scattering of $\mathrm{\alpha }$ particles

by a thin foil of gold, draw the trajectory of $\mathrm{\alpha }$-particles in the Coulomb

field of target nucleus. Explain briefly how one gets the information on

the size of the nucleus from this study.

From the relation $\mathrm{R}={\mathrm{R}}_{0}{\mathrm{A}}^{1/3}$, where ${\mathrm{R}}_{0}$ is constant and A is the

mass number of the nucleus, show that nuclear matter density is

independent on A.                                                                    (3 marks)

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