Question

Can someone pls help me with this question?:

Rutherford could not find all the mass of the nucleus during his first observations. Describe the discovery that helped explain this phenomenon?
I appreciate your help!

Answer 1

James Chadwick

Step-by-step explanation:

In his first experiment, Rutherford was unable to predict the total mass of nucleus. He noticed that if only electrons and protons are present in the nucleus then by adding their masses, it falls short of the net mass of the atom. so he concluded that there must be another particle and that Particle was later discovered by James Chadwick in 1932.