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संबंधित प्रश्न
What are free electrons?
What do you mean by Atomic mass
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?
An element P disintegrates by α - -emission and the new element suffers two further disintegrations, both by β -emission, to form an element Q. Explain the fact that P and Q are the isotopes.
How is a zinc sulphide screen affected when a cathode ray beam strikes it?
What is the value of the speed of gamma radiations in air or vacuum?
Mention one important function of ear main parts:
State the principle on which the functioning of a nuclear reactor is based.
Two radioactive sources A and B of half lives of 1 hour and 2 hours, respectively, initially contain the same number of radioactive atoms. At the end of two hours, their rates of disintegration are in the ratio of ______.
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.
