Home
Class 12
CHEMISTRY
Fill in the blanks with appropriate item...

Fill in the blanks with appropriate items :
The `alpha` -activity of `1 gm .^(226) Ra. (t_(1//2)=1620 ` year) is _______ dpm.

Text Solution

Verified by Experts

The correct Answer is:
`2.16 xx 10^(12) dpm`
`A=N lambda =((1)/(226)xxN_(A)) xx(0.693)/(1620 xx12 xx24xx30xx60)`
`2.16 xx 10^(-12)` d.p.m
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Fill in the blanks: 1/2=""/20

.Fill in the blanks with appropriate answer. I can’t remember ———- it was.

What is the alpha - activity in disintigration per minute 1 gm sample of ""^(226)Ra. (t_(1//2) = 1620 " year" )

Fill in the blanks with appropriate items : This binding energies per nucleon for ._(1)H^(2) and ._(2)H^(4) are 1.1MeV and 7.0 MeV respectively. The energy released when two deuterons fuse to form a helium nucleus is __________.

Fill in the blanks with appropriate items : The half-life period of radioactive element _______ minute if 75% of it disintegrates in 40 min.

Fill in the blanks with appropriate items : Symbol is needed to complete the nuclear equation ._(29)^(63)Cu (P, ....). _(29)^(62)Cu

BANSAL-RADIO ACTIVITY-Exercise-3
  1. Fill in the blanks with appropriate items : Symbol is needed to comp...

    Text Solution

    |

  2. During the transformation of .(c )^(a)X of .(d)^(b)Y the number of bet...

    Text Solution

    |

  3. Fill in the blanks with appropriate items : The alpha -activity of 1...

    Text Solution

    |

  4. The half life of the nuclide Rn^(220) is 54.5 sec. What mass of radon ...

    Text Solution

    |

  5. Fill in the blanks with appropriate items : A radioactive substance ...

    Text Solution

    |

  6. Fill in the blanks with appropriate items : This binding energies p...

    Text Solution

    |

  7. True or False Statements : In the nuclear reaction X^(200) rarr A ^(...

    Text Solution

    |

  8. True or False Statements : The decay constant of the end product of...

    Text Solution

    |

  9. True or False Statements : A fraction f(1) of a radioactive sample...

    Text Solution

    |

  10. True or False Statements : In a radioactive element the fraction of...

    Text Solution

    |

  11. True or False Statements : Half-life period of a radioactive substa...

    Text Solution

    |

  12. True or False Statements : The S.I. unit of activity is Curie (Ci).

    Text Solution

    |

  13. True or False Statements : 90% of a radioactive sample is left undec...

    Text Solution

    |

  14. Half-life for certain radioactive element is 5 min. Four nuclei of tha...

    Text Solution

    |

  15. True or False Statements : 5 alpha and 4 beta^(-) are emitted during...

    Text Solution

    |

  16. True or False Statements : The ratio t(1//2) //t(7//8) for a first o...

    Text Solution

    |

  17. Classify each of the following nuclides as either "beta(.(-1)^(0)beta)...

    Text Solution

    |

  18. Which of the following are radioacitve? a. .(48)Cd^(114) b. .(49)...

    Text Solution

    |

  19. Consider the following nuclear reactions : I .(7)^(14)N+.(2)^(4)Hera...

    Text Solution

    |

  20. The activity of the radioactive sample drops to (1/64)^(th) of its o...

    Text Solution

    |