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प्रश्न
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z - 2}X + ^4_{2}He}\]
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उत्तर
This reaction is not allowed because even though charge (atomic number) is conserved in it, the mass number [= A on the L H.S. and equal to (A + 4)] on the R.H.S. is not conserved.
संबंधित प्रश्न
Answer the following questions based on a hot cathode ray tube
Name the charged particles
State three factors on which the rate of emission of electrons from a metal surface depends
What are free electrons?
A radioactive nucleus `""_"Z"^"A"` X first emits a beta particle and then an alpha particle to give the resulting nucleus `""_"Q"^"P"` Y What will be the values of P and Q in terms of A and Z?
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.
A radioactive source emits three types of radiations.
Name the radiation which has the highest ionizing power.
State any two uses of cathode rays.
88Ra226 experiences three α - decay. Find the number of neutrons in the daughter element.
If 10% of a radioactive substance decays in every 5 years, then the percentage of the substance that will have decayed in 20 years will be ______.
In the following atoms, which one is a radioisotope? Give one use of this isotope.
O16, C14, N14, He4
