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प्रश्न
It is advised not to touch a radioactive substance by hand. Give reason.
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उत्तर
The reason is that the radiations (α, β and γ) emitted by a radioactive substance have large penetrating power.
संबंधित प्रश्न
Radioactive substances were found to give off three types of rays. Name them. How do they
(a) React to the magnetic field?
(b) React to the electric field?
(c) Act when different thickness of lead sheets is placed in their path?
Explain the use of radioactive in the field of medicine, agriculture and industry.
What do you mean by electron emission?
In a cathode ray tube state the purpose of the fluorescent screen.
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z + 1}Y + ^0_{-1}β}\]
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 ______.
A radioctive sample decays `7/8` times its original quantity in 15 minutes. The half-life of the sample is ______.
Calculate the time interval between 33% decay and 67% decay if half-life of a substance is 20 minutes.
Complete the following radioactive reaction:
\[\ce{^-_-X -> ^-_-Y + ^4_2He -> ^234_91Z + ^0_-1e}\]
A deuteron strikes 8O16 nucleus with subsequent emission of an alpha particle. Identify the nucleus so produced:
