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प्रश्न
What are ‘Becquerel rays’?
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उत्तर
Becquerel rays are ‘radioactive radiations’, emitted from radioactive substances like uranium, thorium etc. Since these radiations were discovered by Henry Becquerel, so they are named as ‘Becquerel rays’.
संबंधित प्रश्न
What are free electrons?
What do you mean by Atomic mass?
State the penetrating range of α, β and γ radiations.
What do you mean by electron emission?
What is meant by Radioactivity?
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
State three common properties of beta rays and cathode rays.
88Ra226 experiences three α - decay. Find the number of neutrons in the daughter element.
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)
