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CBSE Class 12-science Answered

Differentiate between alpha,beta and gamma decay.
Asked by pksunilnair | 04 Dec, 2017, 09:22: AM
Expert Answer
Alpha particle is nothing but nucleus of Helium. It has 2 protons and 2 neutrons. Hence the parent nuclei mass number reduces by 4 and atomic number
reduces by 2
 
Beta particle is nothing but electron, but beta particle is coming out of nucleus. Beta decay involves neutron changing to proton and in this process a negatively charged beta particle which is equivalent to electron is emmitted from nucleus. Hence the parent nuclei mass number does not change but atomic number increased by one.
 
Gamma rays are nothing but elecro-magnetic radiation. Most of the time it is accompanied by alpha/beta emission. But some time excited nucleus emits only gamma ray. 
Answered by | 04 Dec, 2017, 03:13: PM

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