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प्रश्न
What is meant by Radioactivity?
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उत्तर
Process of spontaneous emission of α or β and γ radiations from the nuclei of atoms during their decay.
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संबंधित प्रश्न
What are free electrons?
Name a gas caused by the Greenhouse effect
Complete the diagram as given above by drawing the deflection of radioactive radiations in an electric field
A nucleus of an element X which has the symbol `""_84^202` X emits an alpha particle and then a beta particle. The final nucleus is `""_"b"^"a"` Y Find a and b.
A radioactive substance is oxidized. What changes would you expect to take place in the nature of radioactivity? Explain your answer.
A radioactive source emits three types of radiations.
Name the radiation which has the highest ionizing power.
During the emission of a beta particle, the ______ number remains same.
State two characteristics of the substance used as thermionic emitter.
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
A radioactive element is placed in an evacuated chamber. Then the rate of radioactive decay will ______.
