Radioactivity
Radioactivity: Overview
This topic covers concepts such as Natural Radioactivity, Artificial Radioactivity, Parent Nuclei, Daughter Nuclei, Alpha Decay, Change in Atomic Number after Alpha Decay, Change in Mass Number after Alpha Decay, Beta Decay, etc.
Important Questions on Radioactivity
Out of the two characteristics – the mass number (A) and the atomic number (Z) – of a nucleus, which one does not change during nuclear decay?
Out of the two characteristics – the mass number (A) and the atomic number (Z) – of a nucleus, which one does not change during nuclear decay?
The expression for the average life of a radionuclide that shows its relationship with the half – life would be:
A radioactive sample contains of pure which has half-life period of . Calculate the number of atoms present initially and the activity when of the sample will be left.
Which are amongst the following represent plot of the distribution of kinetic energy of particles?
particle is emitted in a radio active reaction when
When Boron nucleus is bombarded by neutrons, - particles are emitted. The resulting nucleus is of the element _____________ and has the mass number_____________
In the Uranium radioactive series, the initial nucleus is and the final nucleus is . When the Uranium nucleus decays to lead, the number of particles emitted is _______________ and the number of particles emitted is _______________.
The radioactive decay rate of a radioactive element is found to be 103 disintegration/second at a certain time. If the half life of the elements is one second, the decay rate after one second is ________________ and after three seconds is _____________.
When a radioactive element emits a beta particle, a daughter nucleus is formed whose _____ number is the same and the atomic number is more by 1 unit, than the atomic number of the parent nucleus.
When a radioactive element emits an alpha particle, a daughter nucleus is formed whose mass number is less by units and the _____ number is less by units, than the mass number and atomic number of the parent nucleus.
Soddy's, Fajan's and Russell observed that when an a-particle is lost, a new element with atomic number less by 2 and mass number less by 4 is formed. This statement is true or false?
What is the significance of artificial radioactive nuclides?
What is artificial radioactivity discuss the useful application of radioactive isotopes?
What is artificial radioactivity explain with example?
