Hi,

The mass number of an atom is the total number of protons and neutrons in a nucleus.

And the atomic number is number of protons found in the nucleus.

There are two types of beta decay-

(β ⁻ ) decay -a neutron is converted to a proton, and electronis created.

beta plus (β ⁺ ) decay - a proton is converted to a neutron and the process creates a positron and an electron neutrino.

Now understand what happens in beta minus decay-

Suppose carbon 14 is converted to nitrogen 14 in the beta decay. The mass number is same of both i.e 14 but the atomic number increases by one in case of nitrogen. As it is an example of beta minus decay what happens here is neutron is converted into proton so we have mass number (proton +neutron) same. But the atomic number (number of proton) get increased by one.

Hope you find it helpful.

Hello aspirant

The rest mass of the stable nucleus of a stable atom is always less than the sum of the masses of constituent nucleons.

The difference is called the mass defect Δm (i.e., Δm.c ² ) which is utilised in keeping the nucleons bound together. This energy is known as the binding energy .

In order to break the nucleus into its constituent nucleons an amount of energy equal to its binding energy has to be supplied to the nucleus.

Binding energy per nucleon is obtained by dividing the binding energy with mass number and is the measure of the stability of nucleus.

The binding energy per nucleon is less for lighter nuclides and increase with the mass number.

Thus, the binding energy per nucleon decreases with increase in the mass number.

Hope this helps

Hi,

The C-14 isotope is used to predict the age of archaeological findings. It is an isotope of carbon.

The radioactive disintegration of isotope C-14 occurs through a first order kinetics and half life of this isotope is 5,730 years. As all the organic archaeological findings have carbon in them this is a suitable for finding the age.

Hope this helps.

Hello Ayush...hope you are doing good...Radioactive phosphorus(P-32) is used for blood cancer treatment...this is called Radioactive therapy also...it is used for mainly Polycythaemia vera(PV) and Essential thrombocythaemia (ET). Hope this will help you.