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What is the ratio of mass of a gold atom...

What is the ratio of mass of a gold atom and an `alpha`-particle ?

Text Solution

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`(mass_"gold")/(mass_(alpha-"particle"))=197/4`
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What is the ratio of mass of an alpha -alpha particle and a proton ?

An atom has atomic mass 232 and atomic number 90. During the course of disintegration, it emits 2 beta -particles and few beta -particles and few alpha -particles. The resultant atom has atomic mass 212 and atomic number 82. How many alpha -particles are emitted during this process?

Knowledge Check

  • If the de - Broglie wavelengths for a proton and for an alpha - particle is equal , then what is the ratio of velocities for proton and alpha particle?

    A
    `4 : 1`
    B
    `2 : 1`
    C
    `1 : 2`
    D
    `1 : 4`

  • if m_p and m_(alpha) are masses of proton and alpha- particles find ratio of momentum of a proton and an alpha- particle which are accelerated fromr est by a potential difference of 200 V.

    A
    `(m_(p))/(2m_(alpha))`
    B
    `(2m_(alpha))/(m_(p))`
    C
    `(sqrt((m_(p))/(2m_(alpha))))`
    D
    `sqrt((2m_(p))/(m_(alpha)))`

  • The mass of an alpha- particle is.

    A
    Less than the sum of masses of two protons and two neutrons
    B
    Equal to mass of four protons
    C
    Equal to mass of four neutrons.
    D
    Equal to sum of masses of two protons and two neutrons

    • Similar Questions

    Explore conceptually related problems

    A radon nucleus with an atomic mass of 216 emits an alpha- particle with an atomic mass 4 and a kinetic energy 8 MeV. What is the energy of the recoil nucleus?

    An atom has atomic mass 232 atomic number 90. During the course of disintegration, it emits 2 beta particles and few alpha particles. The resultant atom has atomic mass 212 and atomic number 82. How many alpha particles are emitted during this process?

    When alpha rays hit a thin foil of gold, a very few alpha particles are deflected back. What does it prove?

    An alpha particle and a proton fall through the same potential difference. Find the ratio of their momentra if the mass of the alpha particle is four times that of the proton.

    What will be the ratio of de - Broglie wavelengths of proton and alpha - particle of same energy ?

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