- Carbon-14(C14) decays at a constant rate in such a way that it reduces to 50% in 5568 years. Find the age of an old wooden piece in which the carbon is only 25% of the original.
- Radioactive nuclei
- Radioactive elements
- Half-life period of a radioactive sample is 2 days. If the number of nuclei initially present is
, find the number of nuclei present after 8 days?
- figure for 13.6 in chapter nuclei
- The half life period of a radioactive substance is 30 days. What is the time for ¾ th of its original mass to disintegrate?
- How many α and β-partiles are emitted 90Th232 changes to 82Pb208?
-
Complete the following nuclear reactions
(a) 4Be9 + 1H1 →3Li6 + ................
(b) 5B10 +
→ 
+ ..............
- What fraction of tritium will remain after 25 years? Given half life of tritium as 12.5 years.
- A neutron is absorbed by a 3Li nucleus with subsequent emission of alpha particle. Write the corresponding nuclear reaction?
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