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When a silver foil (Z = 47) was used in ...

When a silver foil (Z = 47) was used in an `alpha ` ray scattering experiment , the number of `alpha`-particles scattered at `30^(@)` was found to be 200 per minute. If the silver foil is replaced by alumninium (z = 13) foil of same thickness, the number of `alpha`-particles scattered per minute at `30^(@)` is nearly equal to

A

15

B

30

C

10

D

20

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-ATOMS-EXERCISE -II
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  2. When a silver foil (Z = 47) was used in an alpha ray scattering exper...

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  3. In Rutherford experiments on alpha- ray scattering the number of parti...

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  4. If the electron in an hydrogen atom jumps from an orbit with level n(f...

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  5. An alpha nucleus of energy 1/2 m vartheta^(2) bombards a heavy nuclear...

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  6. In Rutherford's alpha particle scattering experiment with their gold f...

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  7. An alpha- particle of energy 5 Mev is scattered through 180^(@) by a f...

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  8. When the electron in hydrogen atom jumps from the second orbit to the...

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  9. The ratio of the largest to shortest wavelengths in Balmer series of h...

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  10. An electron in a hydrogen atom makes a transition n(l) rarr n(2), wher...

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  11. Any radiation in the ultra violet region of Hydrogen spectrum is able ...

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  12. A hydrogen atom emits a photon corresponding to an electron transtion ...

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  13. The wave number of energy emitted when electron jumbs from fourth orbi...

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  14. In a Bohr atom the electron is replaced by a particle of mass 150 time...

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  15. If the wavelength of first member of Balmer series of hydrogen spectru...

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  16. A hydrogen-like atom (atomic number Z) is in a higher excited state of...

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  17. Electrons from n = 2 to n= 1 in hydrogen atom is made to fall on a met...

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  18. Let vartheta(1) be the frequency of the series limit of the Lyman seri...

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  19. The transition from the state n = 4 to n = 3 in a hydrogen like atom r...

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  20. Energy required for the electron excitation in Li++ from the first to ...

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