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प्रश्न
When does the nucleus of an atom tend to become radioactive?
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उत्तर
When the number of neutrons exceeds much than the number of protons in a nuclei, it become unstable or radioactive.
संबंधित प्रश्न
Name a gas caused by the Greenhouse effect
When is said to be the nucleus unstable?
Draw a diagram of a simple atom showing the nucleus and electrons. In this atom:
(a) What type of charge will there be on the nucleus?
(b) What is the value of this charge?
State three safety precautions that you would take while handling the radioactive substances.
What is meant by Radioactivity?
Name the Different Radiations Which Are Emitted by the Radioactive Substances.
Are all the radiations mentioned by you, emitted in a single radioactive decay?
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 ______.
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 ______.
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.
