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प्रश्न
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संबंधित प्रश्न
Name the radiations which are absorbed by greenhouse gases in the earth’s atmosphere.
Answer the following questions based on a hot cathode ray tube.
State the approximate voltage used to heat the filament
What do you mean by Atomic 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?
A radioactive substance is oxidized. What changes would you expect to take place in the nature of radioactivity? Explain your answer.
Name the three main parts of a Cathode Ray Tube.
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.
The mean lives of a radioactive substance are 1620 and 405 years for β-emission and β-emission respectively. The time after which three fourth of a sample will decay if it is decaying both by β-emission and β-emission simultaneously will be ______ years.
(Take ln 2 = 0.693)
In the following atoms, which one is a radioisotope? Give one use of this isotope.
O16, C14, N14, He4
