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NEET 2009 (AIPMT) · Atomic Models & Alpha-Particle Scattering

Atomic Models & Alpha-Particle Scattering question from NEET 2009 (AIPMT)

Q14NEET 2009 · AIPMTEasy

Atomic Models & Alpha-Particle Scattering

In a Rutherford scattering experiment when a projectile of charge z1 and mass M1 approaches a target nucleus of charge z2 and mass M2, the distance of closest approach is r0. The energy of the projectile is

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Answer: (a)

At closest approach, KE of projectile = PE: $E = \dfrac{k z_1 z_2 e^2}{r_0}$ .
For a given $r_0$ , $E \propto z_1 z_2$ ; it does not depend on the masses.
So the answer is (a).

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