Models of Atomic Structure

The understanding of atomic structure has evolved over time
The alpha particle scattering experiment by Rutherford indicated that an atom’s mass is concentrated at the nucleus, which is charged
This experiment led to the rejection of the plum pudding model of atom and established the nuclear model
Niels Bohr proposed that electrons orbit the nucleus in fixed energy shells, known as the Bohr model, which aligns with observed atomic emission/absorption spectra
The Bohr model was later refined by including sub-shells within these energy levels.