Question

Give Reason-All the mass of an atom is concentrated on the nucleus

Answer 1

all the mass of an atom is concentrated on the nucleus because it contains protons and neutrons

Answer 2

Picture 1.6 An atom has a nucleus with electrons outside it. The atom is made from a central nucleus with electrons around the outside. The electrons have a negative charge and very little mass. Most of the mass of the atom is concentrated in the nucleus, which has a positive charge.