Home
Class 12
CHEMISTRY
The half- life periods of four isotopes ...

The half`-` life periods of four isotopes are give below `:`
`(i) 7.6 years` , ` ii. 4000 years`
`iii. 6000 years`,`iv. 3.2xx10^(5) years`
Which of the above isotope is most stable ?

A

`iv.`

B

`iii.`

C

`ii.`

D

`i.`

Text Solution

Verified by Experts

The correct Answer is:
A
Higher the half`-` life period more stable is the substance.
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR CHEMISTRY

    CENGAGE CHEMISTRY|Exercise Ex6.4 Objective|7 Videos

  • NUCLEAR CHEMISTRY

    CENGAGE CHEMISTRY|Exercise Ex6.5 Objective|10 Videos

  • NUCLEAR CHEMISTRY

    CENGAGE CHEMISTRY|Exercise Ex6.2 Objective|8 Videos

  • NCERT BASED EXERCISE

    CENGAGE CHEMISTRY|Exercise Nuclear Chemistry (NCERT Exercise)|29 Videos

  • ORGANIC COMPOUNDS WITH FUNCTIONAL GROUP

    CENGAGE CHEMISTRY|Exercise Archives Analytical And Descriptive|24 Videos

Similar Questions

Explore conceptually related problems

The activity of a nucleus is inversely proportional to its half of average life. Thus, shorter the half life of an element, greater is its radioactivity, i.e., greater the number of atomsd disintegrating per second. The relation between half life and average life is t_(1//2) = (0.693)/(lambda) = tau xx 0.693 or tau = 1.44 t_(1//2) The half-life periods of four isotopes are given 1 = 6.7 years, II = 8000 years, III = 5760 years, IV = 2.35 xx 10^(5) years. Which of these is most stable?

The half life period of four isotopes (i) 6.7 yr " " (ii) 8xx10^(3) yr (iii)5760 yr " " (iv) 2*35xx10^(5) yr, The most stable isotope is

The half life of a radio isotope is 5 years . The fraction which will decay in 15 years , will be

A sample of uranium is a mixture of three isotopes ._(92)U^(234), ._(92)U^(235) and ._(92)U^(238) present in the ratio 0.006%, 0.71% and 99.284% respectively. The half lives of then isotopes are 2.5xx10^(5) years, 7.1xx10^(8) years and 4.5xx10^(9) years respectively. The contribution to activity (in % ) of each isotope in the sample respectively

The half life period of a radioactive substance is 10 year. The amount of the substance decayed after 40 years would be

The half - life of ._6C^(14) , if its lamda is 2.31 xx10^(-4) " year"^(-1) is

Calculate the half-life period of a radioactive element which remains only 1/16 of it's original amount in 4740 years. ( A) 1185 years ( B) 2370 years (C) 52.5 years (D) none of these

Calculate the half-life period of a radioactive element which remains only 1/16 of it's original amount in 4740 years. ( A) 1185 years ( B) 2370 years (C) 52.5 years (D) none of these

CENGAGE CHEMISTRY-NUCLEAR CHEMISTRY-Ex6.3 Objective
  1. Radiactive decay is a reaction of

    Text Solution

    |

  2. Quantity of radiactive material which undergoes 10^(6) disintegrations...

    Text Solution

    |

  3. One curie of activity is equivalent to

    Text Solution

    |

  4. The unit for radioactive constant is

    Text Solution

    |

  5. The relation between half-life period (t(1//2)) and disintegration con...

    Text Solution

    |

  6. If 2g of an isotope has a half- life of 7 days, the half life of 1g s...

    Text Solution

    |

  7. Half-life of a radioactive disintegration (A rarr B) having rate const...

    Text Solution

    |

  8. C^(14) has a half- life of 5760 years. 100mg of the sample containing ...

    Text Solution

    |

  9. If 3//4 quantity of a radioactive substance disintegrates in 2 hours, ...

    Text Solution

    |

  10. The initial mass of a radioactive element is 40g. How many grams of it...

    Text Solution

    |

  11. A radioisotope has a half life of 10 days. If tofay there is 125 g of...

    Text Solution

    |

  12. The half- life periods of four isotopes are give below : (i) 7.6 yea...

    Text Solution

    |

  13. Ra^(226) has half life of 1600 years. The number of disintegration per...

    Text Solution

    |

  14. The decay constant of Ra^(226) is 1.37xx10^(-11)s^(-1). A sample of Ra...

    Text Solution

    |

  15. The number of alpha- particles emitted per second by 1g of Ra^(226) is...

    Text Solution

    |

  16. Radioactivity of a radioactive element remains 1//10 of the original r...

    Text Solution

    |

  17. At radioactive equilibrium, the ratio between two atoms of radioactive...

    Text Solution

    |

  18. The decay constant for an alpha- decay of Th^(232) is 1.58xx10^(-10)s^...

    Text Solution

    |

  19. What percentage of decay takes place in the average life of a substan...

    Text Solution

    |

  20. The half life of Ra is 1600 years. The fraction of a sample of Ra that...

    Text Solution

    |