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Sub-Atomic Particles

ntIn gold foi...

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ntIn gold foil experiment no. of deflected alpha particles at angle 90' is 63 than number of alpha particle deflected at 120' is:-n nt1-112n nt2-42n nt3-56n nt4-28n

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Q. In the gold foil experiment, few alpha particles got deflected by small angles.

Q. Question 43
In the gold foil experiment of Geiger and Marsden, that paved the way for Rutherford's model of an atom,

1.00 %

of the alpha-particles were found to deflect at angles

> 50^{\circ}

. If one mole of alpha-particles were bombarded on the gold foil, compute the number of alpha-particles that would deflect at angles less than

50^{\circ}

Q. Why are the "deflections caused by an aluminum foil less than that of gold foil in an

α

-ray scattering experiment. Can these deflections be changed by changing the kinetic energy of

α

Q. Assertion :In Rutherford's gold foil experiment, very few

α

- particles are deflected. Reason: Nucleus present inside the atom is heavy.

Q. Observation:
In the alpha particle scattering experiment, it was observed that few of the alpha particles were deflected at angles greater than

90^{\circ}

Inference:
Only a large proportion of the entire charge should be concentrated at the center of the atom and not the mass.

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