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संबंधित प्रश्न
State any two precautions to be taken while handling radioactive substances
What do you mean by Mass number.
What kind of change takes place in a nucleus when a β -particle is emitted?
What is nucleus of an atom? Compare its size with that of the atom. Name its constitutents. How is the number of these constituents determined by the atomic number its atomic model.
Name the three main parts of a Cathode Ray Tube.
What is meant by Radioactivity?
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z - 2}X + ^4_{2}He}\]
What is the value of the speed of gamma radiations in air or vacuum?
State one use of radio-isotopes.
In U238 ore containing Uranium the ratio of U234 to Pb206 nuclei is 3. Assuming that all the lead present in the ore is final stable product of U238. Half life of U238 to be 4.5 × 109 years and the age of ore is ______ × 109 years. (in 109 years)
