Home
Class 12
PHYSICS
Tritium has a half-life of 12.5 y underg...

Tritium has a half-life of 12.5 y undergoing beta decay. What fraction of a sample of pure tritium will remain undecayed after 25 y.

Text Solution

Verified by Experts

By definition of half-life, half of the initial sample will remain undecayed after 12.5 y. In the next 12.5 y, one-half of these nuclei would have decayed. Hence, one fourth of the sample of the initial pure tritium will remain undecayed.
Promotional Banner

Topper's Solved these Questions

  • NUCLEI

    NCERT BANGLISH|Exercise EXERCISE|22 Videos

  • NUCLEI

    NCERT BANGLISH|Exercise ADDITIONAL EXERCISES|8 Videos

  • MOVING CHARGES AND MAGNETISM

    NCERT BANGLISH|Exercise ADDITIONAL EXERCISES|16 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    NCERT BANGLISH|Exercise EXERCISES|38 Videos

Similar Questions

Explore conceptually related problems

The half-life of a radio-isotope is 3 min. What fraction of the number of these isotopes in a sample would remain intact after 15 min ?

If the half-life of a radioactive nucleus is 3 days, nearly what fraction of the initial number of nuclei will decay on the 3rd day? (Given, 3sqrt(0.25)~~ 0.63 ).

The half-life of a radioactive element is 1600 y. What part of the element will remain after 6400 y ?

The half-life of ._92^238U undergoing alpha -decay is 4.5xx10^9 year. What is the activity of 1 g. sample of ._92^238U ?

What is meant by pseudo unimolecular reaction? Explain with an example. 0.0625 g remains from 1 g of a radioactive element after 20 years of radioctive decay. Determine the rate constant and half-life (t_(1//2) of the reaction. How much of the element did remain after 10 years from the start?

The half-life of U^238 is 4.5xx10^9 y. In any radioactive sample if 1 g. of that element remains present then determine the activity of the sample in curie unit. (Avogadro number = 6.023xx10^23 ).

A radioisotope Y with half-life 1.4xx10^9 years decays to X which is stable. A sample of the rock from a cave was found to contain X and Y in the ratio 1:7 . The age of the rock is - (A) 1.96 × 10^9 years. (B) 3.92 × 10^9 years. (C) 4.20 × 10^9 years. (D) 8.40 × 10^9 years.

The half-life for decay of ""^(14)C by beta -emission is 5730 years. The fraction of ""^(14)C decays, in a sample that is 22,920 years old, would be

The amount of radium in a radioactive sample is 16 g. What amount of radium will remain in the same after 4800 y if the half-life of radium is 1600 y ?