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Assertion (A) : Nucleus of the atom doe...

Assertion `(A) :` Nucleus of the atom does not contain electrons, yet it emits `beta-`particles in the form of electrons.
Reason `(R):` In the nucleus , protons and neutrons exchange mesons frequently.

A

If both `(A)` and `(R)` are correct , and `(R)` is the correct explanation of `(A)`

B

If both `(A)` and `(R)` are correct, but (R) is not the correct explanation of `(A)`

C

If `(A)` is correct, but `(R)` is incorrect.

D

If `(A)` is incorrect, but `(R)` is correct.

Text Solution

Verified by Experts

The correct Answer is:
C
`beta-` particle is emitted not due to exchange of meson between neutron and proton but due to conversion of a neutron into proton as follows `:`
`._(0)n^(1)rarr+._(+1)p^(1)+._(-1)e^(0)`
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Knowledge Check

  • Assertion (A) : Nucleus of the atom does not contain electrons,yet it ewmits beta -particles in the form electrons Reason (R ) : In the nucleus, protons and neutrons exchange mesons frequently

    A
    If both (A) and (R ) are correct, and (R ) is the correct explaination of (A)
    B
    If both (A) and (R ) are correct, but (R ) is not the correct explaination of (A)
    C
    If (A) is correct,but (R ) is incorrect
    D
    If both (A) and (R ) are incorrect.

  • Radioactive nuclei emit beta^-1 particles. Electrons exist inside the nucleus.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false
    D
    If assertion is false but reason is true.

  • In the nucleus of ._(11)Na^(23) , the number of protons, neutrons and electrons are

    A
    `11, 12, 0`
    B
    `23, 12, 11`
    C
    `12, 11, 0`
    D
    `23, 11, 12`

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    Nucleus of an atom contains 5 protons and 6 neutrons. The valency of element will be

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    Which of the following atom does not contain the same number of protons and neutrons in its nucleus?

    How many electrons will be present in the nucleus of a neutral atom with 12 protons?

    A: In beta -decay an electron is emitted by the nucleus R: Electrons are not present inside the nucleus.

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