These isotopes differ from one another due to the number of neutrons. The atomic weight is the sum of the proton and the neutron.
A radioactive form of an element is one of two or more forms of the same element that have the same number of protons but varying numbers of neutrons in their nuclei is known as the isotopes.
Most sodium atoms have an atomic mass of 23, but a few have atomic masses of 22 or 24. The isotopes differ from one another in the number of neutrons in the nuclei.
The atomic weight is the sum of the proton and the neutron.
Atomic weight= proton+neutrons
The no of protons and electrons is the same.Due to the number of the neutrons in the atom, the weight of the element changes
Hence these isotopes differ from one another due to the number of neutrons.
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