Neutrons, Particles with no charge in the nucleus, Nucleus, Centre of the atom, contains neutrons and protons, Electrons, Negatively charged particles in shells, Bohr's discovery, Electrons are in shells around the nucleus at fixed points, Chadwick's discovery, Neutrons in the nucleus, Rutherford's discovery, Most of the atom is empty space, the nucleus is very small and heavy, 2.8.8.18, Number of elements in the 1st 4 periods and the number of electrons that fit in the shell, Repel, When two like charges push apart from each other, Ion, A charged particle, Protons, Positively charged particles in the nucleus.

Atomic Structure

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