Advertisements
Advertisements
प्रश्न
An element P disintegrates by α - -emission and the new element suffers two further disintegrations, both by β -emission, to form an element Q. Explain the fact that P and Q are the isotopes.
Advertisements
उत्तर
The atomic number of P decreases by 2 and mass no. decreases by 4 due to the emission of one alpha particle and then increases by 1 due to the emission of each beta particle, so the atomic number of Q formed after the emission of one alpha and two beta particles is same as that of P. Hence P and Q are the isotopes.
संबंधित प्रश्न
Arrange α, β, and γ rays in ascending order with respect to their
1) Penetrating power.
2) Ionising power
3) Biological effect
What is meant by radioactivity?
What do you mean by Atomic mass
State two similarities and two dissimilarities between the γ-rays and X-rays.
During the emission of a beta particle, the ______ number remains same.
What are cathode rays? Why are they called ‘cathode rays’? Name a material which exhibits fluorescence when cathode rays fall on it.
In a cathode ray tube state the purpose of the fluorescent screen.
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z - 2}X + ^4_{2}He}\]
What is the value of the speed of gamma radiations in air or vacuum?
88Ra226 experiences three α - decay. Find the number of neutrons in the daughter element.
