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nucleus of the atom has positive charge.alpha particles are also positively charged.like charges repel each other.so alpha particles passing near the nucleus are repelled and deviated from the normal path

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Q: Why did the path of only some alpha particles deviate?
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Why did the path of only some alpha particles deviate in Rutherford experiment?

Alpha particles are positively charged helium nuclei. As such, they are repelled by other positively-charged nuclei. In Rutherford's experiment, he used gold foil. Since gold atoms have large, massive nuclei, the alpha particles were easily repelled by the large gold atom nuclei, and they were scattered in different directions.


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Why alpha ray form along curved then beta ray?

Alpha and beta particles only travel along curved paths when they are affected by a magnetic field. This is because they are charged particles, and so feel a force perpendicular to the direction of the field and the direction they are travelling in, described by this equation.F=q(vxB)where q is the charge on the particle, v is the particles velocity, and B is the magnetic field strength.The charge on an alpha particle is twice that on a beta particle, and consequently the force on it is twice as big so it moves along a more steeply curved path.


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