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12.Atoms
medium
Particles used in the Rutherford's scattering experiment to deduce the structure of atoms
A
had atomic number $2$ and were fully ionised
B
had atomic number $2$ and were neutral
C
had atomic number $4$ and were fully ionised
D
had atomic number $4$ and were neutral
(KVPY-2017)
Solution
(a)
Particles used in Rutherford's scattering experiment (Geiger-Marsden experiment) are $\alpha$-particles derived from a tube of radium emanation (or radon).
$\alpha$-particles are helium nuclei ${ }_2^4 He$, they are fully ionised and have atomic number $2 .$
Standard 12
Physics
