Rutherford discovered in the early 1900s that most of an atom's mass is located in its nucleus.
Rutherford
Rutherford discovered that almost entire mass of an atom is located in the nucleus, and then, the neutron was discovered by Chadwick.
the experiments of Ernest Rutherford in 1910
Approximately all of the atom's mass is in the nucleus. The electrons contribute almost zero.No atom has more than 100 electrons, but eachproton or neutron in the nucleushas the mass of more than 1,800 electrons.
The discovery of the nucleus by Ernest Rutherford in the early 20th century provided evidence that the majority of an atom's mass is concentrated in a small, dense region at the center. Rutherford's gold foil experiment demonstrated that most of the alpha particles passed through the foil undeflected, indicating the presence of a concentrated mass at the center of the atom. This led to the development of the nuclear model of the atom, which suggests that the nucleus contains the majority of an atom's mass.
It is in the nucleus. Electrons are very small
Ernest Rutherford
Ernest Rutherford
Ernest Futher Ford
in the centre within nucleus where protons and neutrons are located.protons and neutrons have atomic mass of 1 u each while electrons revolving around have mass=0u[almost negligible]. so most of the mass is located in centre of an atom.
Almost all of the volume of an atom has no mass.
1909-1911