He added the proton. He thought that the only particle in the nucleus was the proton. The neutron was discovered much later by Chadwick.
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Rutherford added the concept of a dense, positively charged nucleus at the center of the atom, with electrons orbiting around it in a mostly empty space. This model became known as the Rutherford model of the atom.
Rutherford's atomic model, known as the solar system model, proposed that atoms have a dense, positively charged nucleus at the center, with electrons orbiting around it. This model implied that most of the mass of an atom is concentrated in the nucleus, and that electrons are distributed in specific energy levels around it. Rutherford's model contributed to the understanding of the atom's structure and laid the foundation for future atomic theories.
He found that the atom was made up of mostly empty space.
Nucleus - Rutherford fired particles at gold foil, and most went straight through. This showed that most of atoms are empty, and that most of the mass only occupies a small part of the atom. This part is known as the nucleus.
The dense center of the atom is called the nucleus. It contains protons and neutrons, which make up the majority of an atom's mass.
nucleus