Alpha-particle scattering experiment; Rutherford’s model of atom; Bohr model, energy levels,
hydrogen spectrum.

12th physics. NCERT notes

Hydrogen Spectrum

Atoms of each element are stable and emit characteristic spectrum. The spectrum consists of a set of isolated parallel lines termed as line spectrum....
12th physics. NCERT notes

Bohr Model

Bohr combined classical and early quantum concepts and gave his theory in the form of three postulates. These are: Bohr’s first...
12th physics. NCERT notes

Alpha-Particle scattering and Rutherford’s Nuclear Model of Atom

Rutherford proposed a new model of the atom based on Alpha-Particle Scattering experiment. In 1911, Ernst Rutherford suggested some experiments to H. Geiger and E....