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For nuclide ""(Z)X""^(A), which of the f...

For nuclide `""_(Z)X""^(A)`, which of the following changes snot take place in respective decay: a)Both (A) and (Z) decreases in `alpha`-decay b)Both (A) and (Z) do not change in `gamma`-decay c)(A) does not change but (Z) decreases by one unitun positrondecay or k-electron capture d)Both (A) and (Z) increases in `beta`-decay

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The correct Answer is:
`""^(99)As` and `""^(158)Nd`
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Knowledge Check

  • In the radioactive decay of ""_(Z)X^(A) , which of the following could be considered as incorrect statement?

    A
    `alpha`-decay involves the decrease of both A and Z by 2
    B
    `beta`-dacay involves the increase of Z by one, A remaining constant
    C
    K-electron capture results in the decrease of Z by one with no change in A and emission of `gamma`- rays
    D
    `gamma`- ray emission is followed by the emission of `alpha` or `beta` - particles

  • In which of the following decays the atomic number decreases? (i) alpha -decay (ii) beta^(+) -decay (iii) beta^(-) -decay (iv) electron capture

    A
    `(i),(ii),(iii)`
    B
    `(ii),(iii),(iv)`
    C
    `(i),(ii),(iv)`
    D
    all

  • A nuclide has mass number (A) and atomic number (Z). During a radioactive process if: (A) both A and Z decrease, the process is called alpha -decay (B)A remains unchanged and Z decreases by one, the process is called beta^(+) or positron decay of K-electron capture (C ) both A and Z remain unchanged the process is called gamma -decay (D)both A and Z increase, the process is called nuclear isomerism. The correct answer is:

    A
    1,2 and 3
    B
    2,3, and 4
    C
    1,3, and 4
    D
    1,2, and 4

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    When a nucleus with atomic number Z and mass number A undergoes a radioactive decay process, (i) Both Z and A will decrease, if the process is alpha decay (ii) Z will decrease but A will not change, if the process is beta^(+)- decay (iii) Z will increase but A will not change, if the process is beta- decay (iv) Z and a will remain uncharged, if the prices is gamma decay

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