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प्रश्न
Name two radioactive substances.
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उत्तर
Two radioactive substances are Uranium, Radium.
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संबंधित प्रश्न
State any two precautions to be taken while handling radioactive substances.
What is meant by radioactivity?
When is said to be the nucleus unstable?
During the emission of a beta particle, the ______ number remains same.
State any two uses of cathode rays.
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.
If 10% of a radioactive substance decays in every 5 years, then the percentage of the substance that will have decayed in 20 years will be ______.
While investigating which phenomena was Becquerel studying uranium salts when he discovered radioactivity?
Why do the nuclei of some atoms undergo radioactive decay?
How does the ionising power of beta particles compare with that of alpha particles?
