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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
Under which conditions does the nucleus of an atom tend to radioactive?
What is meant by radioactivity?
What kind of change takes place in a nucleus when a β -particle is emitted?
State three safety precautions that you would take while handling the radioactive substances.
State one use of radio-isotopes.
State three ways of obtaining an electron-beam.
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.
Two radioactive materials A and B have decay constants 25λ and 16λ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of B to that of A will be "e" after a time `1/("a"lambda)` The value of a ______.
Assertion (A): Hydrogen atom consists of only one electron but its emission spectrum has may lines.
Reason (R): Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.
