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a-particle are projected toward the nucl...

a-particle are projected toward the nuclei of the different metals , with the same kinetic energy . The distance of closest approach is minimum for

A

Cu (Z=29)

B

Ag(Z=47)

C

Au(Z=79)

D

Pd(Z=46)

Text Solution

Verified by Experts

The correct Answer is:
A
`r =(1)/(4pi epsilon_(0)(KE))rArr r alpha q_(2)`.
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Knowledge Check

  • a-particles are projected towards the following metals,with the same kinetic energy. Towards which metal, the distance of closest approach is minimum?

    A
    `Cu(Z = 29)`
    B
    `Ag (Z = 47)`
    C
    `Au (Z = 79)`
    D
    `Ca(Z = 20)`

  • Alpha-particles are projectied towards the nuclei of the following metals with the same kinetic energy. Towards which metal, the distance of closest approach is minimum?

    A
    `Cu(Z=29)`
    B
    `Ag(Z=47)`
    C
    `Au(Z=79)`
    D
    `Pd(Z=46)`

  • If an alpha -particle is incident directly towards a nucleus then it will stop when the distance between them is the distance of closest approach. Which of these is correct?

    A
    Its kinetic energy is converted into released radiation
    B
    When its kinetic energy becomes zero then it converts into electrostatic potential energy
    C
    At distance of closest approach the potential energy of the `alpha`-particle becomes zero
    D
    A `beta`-particle will show the same behaviour as an `alpha`-particle

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