Home
Class 12
PHYSICS
A radioactive nucleus ‘A’ undergoes a se...

A radioactive nucleus ‘A’ undergoes a series of decays according to the following scheme :
`Aoverset(alpha)(to)A_(1)overset(beta)(to)A_(2)overset(alpha)(to)A_(3)overset(gamma)(to)A_(4)`
The mass number and atomic number of A are 180 and 72 respectively. What are these numbers for `A_(4)`?

Text Solution

Verified by Experts

As per decay series, mass number and atomic numbers of various nuclei are :
`" "_(72)^(180)A overset(alpha)(to)" "_(70)^(176)A_(1)overset(beta^(-))(to)" "_(71)^(176)A_(2)overset(alpha)(to)" "_(69)^(172)A_(3)overset(gamma)(to)" "_(69)^(172)A_(4)^(*)` Therefore, mass number of `A_(4)` is 172 and its atomic number is 69.
Promotional Banner

Topper's Solved these Questions

  • NUCLEI

    U-LIKE SERIES|Exercise Long Answer Question-I|22 Videos

  • NUCLEI

    U-LIKE SERIES|Exercise Long Answer Question-II|2 Videos

  • NUCLEI

    U-LIKE SERIES|Exercise Very Short Answer Question|30 Videos

  • MOVING CHARGES AND MAGNETISM

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (SECTION D)|1 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (SECTION B)|3 Videos

Similar Questions

Explore conceptually related problems

A radiactive nucleus 'A' undergoes a series of decays according to the following scheme: Aoverset(alpha)rarrA_(1)overset(beta)rarrA_(2)overset(alpha)rarrA_(3)overset(y)rarrA_(4) The mass number and atomic number A are 180 and 72 respectively. What are these number for A_(4) ?

A radioactive nucleus undergoes a series of deacy according to the scheme. Aoverset(alpha)rarrA_(1)overset(beta^(-))rarrA_(2)overset(alpha)rarrA_(3)overset(gamma)rarrA_(4) If the mass number and atomic number of A are 180 and 172 respectively, what are these numbers for A_(4) .

(a) What are isotones? (b) A overset(alpha) to A_(1) overset(beta) to A_(2) overset(alpha) to A_(3) The mass number and atomic number of A are 180 and 72 respectively. What are these numbers for A_(3) ?

A radioactive nucleus undergoes a series of decay according to the scheme A overset(alpha)rarr A_(1) overset(beta^(-))rarr A_(2) overset(alpha)rarr A_(3)^(172) overset(gamma)rarr A_4 .

(i) A radioactive nucleus 'A' undergoes a series of decays as given below : A overset(alpha)rarr A_(1) overset(beta)(rarr)A_(2)overset(alpha)rarrA_(3)overset(gamma)(rarr)A_(4) . The mass number of atomic number of A_(2) are 176 and 171 respectively. Determine the mass and atomic numbers of A_(4) and A. (ii) Write the basic nuclear processes underlying beta and beta^(-) decays.

A radioactive nuclie decay as follows A overset(alpha)to A_(1)overset(beta) to A_(2) overset(alpha)to A_(3) overset(gamma)to A_(4) . If mass number and atomic number of A are 180 and 72 respectively then mass number and atomic number for A_4 will be

A radioactive nucleus undergoes a series of decays according to the sequence : A overset(beta)rarr A_(1) overset(alpha)rarr A_(2) overset(alpha) rarr A_(3) If the mass number and atomic number of A_(3) are 172 and 69 respectively, what rate the mass number and atomic number of A ?

A nucleus undergoes a series of decay according to the scheme A overset(alpha)(rarr) B overset(beta)(rarr)C overset(alpha)(rarr)D overset(gamma)(rarr) E Atomic number and mass number of E are 69 and 172

U-LIKE SERIES-NUCLEI-Short Answer Questions
  1. State two characteristics of nuclear force. Why does the binding energ...

    Text Solution

    |

  2. If both the number of protons and neutrons in a nuclear reaction is co...

    Text Solution

    |

  3. Plot a graph showing the variation of undecayed nuclei N versus time t...

    Text Solution

    |

  4. Calculate the energy released in MeV in the following nuclear reaction...

    Text Solution

    |

  5. Define ‘disintegration constant’ and ‘mean life’ of a radioactive subs...

    Text Solution

    |

  6. Define half-life period of a radioactive substance. Establish its rela...

    Text Solution

    |

  7. A radio nuclide sample has N(0) nuclei at t=0. Its number of undecayed...

    Text Solution

    |

  8. A radioactive substance has half-life T(1/2) and number of radioactive...

    Text Solution

    |

  9. A radioactive nucleus ‘A’ undergoes a series of decays according to th...

    Text Solution

    |

  10. Complete the following nuclear reactions : (a) " "(5)^(10)B + " "(0)...

    Text Solution

    |

  11. Draw a plot of potential energy of a pair of nucleons as a function of...

    Text Solution

    |

  12. Draw a graph showing the variation of potential energy between a pair ...

    Text Solution

    |

  13. Draw a plot of potential energy of a pair of nucleons as a function of...

    Text Solution

    |

  14. Distinguish between the phenomena of nuclear fission and fusion.

    Text Solution

    |

  15. The half-life of " "(92)^(238)U undergoing alpha-decay is 4.5 xx 10^(9...

    Text Solution

    |

  16. A heavy nucleus X of mass number 240 and binding energy per nucleon 7....

    Text Solution

    |

  17. A nucleus with mass number A = 240 and BE/A = 7.6 MeV breaks into two ...

    Text Solution

    |

  18. Calculate the energy released in fusion reaction : " "(1)^(2)H + " "(1...

    Text Solution

    |

  19. A radioactive sample has activity of 10,000 disintegrations per second...

    Text Solution

    |

  20. (a) Write two distinguishing features of nuclear forces. (b) Complet...

    Text Solution

    |