Mass number is not equal to the sum of the proton, neutron and electron. Why?
Answers
Answered by
3
Mass no. Is sum of protons and neutrons.
Because protons and neutrons are inside the atom and electrons revolve outside the atom.
Because protons and neutrons are inside the atom and electrons revolve outside the atom.
Answered by
2
We know that electrons in an atom have almost negligible mass and all the mass of the atom resides in its nucleus where the protons and neutrons are present as suggested by Rutherford and Chadwick.
Thus,not taking the mass of the electrons into consideration only the mass of the nucleons in the nucleus is taken as the mass of the atom.
Therefore, the mass of the atom = No. of neutrons + No .of protons.
Thus,not taking the mass of the electrons into consideration only the mass of the nucleons in the nucleus is taken as the mass of the atom.
Therefore, the mass of the atom = No. of neutrons + No .of protons.
Similar questions