Choose the correct statement regarding alpha scattering experiment.

CONCEPT:

• Rutherford’s Model of the Atom: He bombarded the beam of alpha particles on a very thin gold foil.

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While bombarding he observes the number of scattering of particles:

• Most of the particles passed either un-deviated or with a very small deviation.
• Some deviated by large angles
• 1 out of 8000 was deflected by more than 90°

The conclusion of this deflection:

• Most of the space of an atom is empty.
• At the center of an atom having a tiny positively charged particle called a nucleus.
• The center nucleus has all the mass of an atom.
• The amount of positive charge at the nucleus is equal to the total amount of negative charges on all the electrons of the atom.
• All the electrons revolve around the nucleus and coulomb force provides the centripetal force.

EXPLANATION:

• From the above discussion, we can say that very few alpha particles are deviated by 90°. So option 4 is correct.