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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.
संबंधित प्रश्न
Name the radiations which are absorbed by greenhouse gases in the earth’s atmosphere.
A radioactive substance is oxidized. Will there be any change in the nature its radioactivity? Give a reason for your answer
In a cathode ray tube, what is the function of anode?
What is meant by radioactivity?
What do you mean by Mass number.
What happens to the mass number of an element when (i) an α -particle, (ii) a β -particle, and (iii) γ -radiation is emitted?
What kind of change takes place in a nucleus when a β -particle is emitted?
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z - 2}X + ^4_{2}He}\]
It is advised not to touch a radioactive substance by hand. Give reason.
Assertion (A): The force of repulsion between atomic nucleus and α-particle varies with distance according to inverse square law.
Reason (R): Rutherford did α-particles scattering experiment.
