Niels Bohr (7 October 1885 – 18 November 1962) Model of Atom

By fobbaf

  • The structure of atoms is somehow related to electricity.

    Michael Faraday was an English scientist who contributed to studying electromagnetism and electrochemistry. Some of his early work included finding a magnetic field around a conductor carrying a direct current. Faraday established the basis for the concept of the electromagnetic field in physics. Faraday’s work with electromagnetic fields helped prove that the atom has a charge. This finding showed that the structure of atoms is somehow related to electricity.

  • Robert Millikan (Measured the charge of an electron using oil droplets.)

    The following essential step leading to Bohr's obit model was finding the electron's charge. American scientist Robert Millikan measured the elementary charge of an electron using oil droplets. Once the charge was determined, the mass of the electron was also found. This critical discovery was important for Bohr's model because it takes a certain amount of energy for electrons to reach different orbits in an atom. https://www.youtube.com/watch?v=GhAn8xZQ-d8

  • Rutherford’s (Nucleus Theory)

    New Zealand scientist Ernest Rutherford showed that the atom's positive charge is concentrated in the nucleus. This is because the nucleus of the atom is where the concentration of the mass of an atom is located. Two years later, Bohr developed his orbital theory of how sub-atomic particles behave in an atom. (Bohr orbital theory.) which was the start of quantum physics. Reference:
    1. Rutherford model https://www.britannica.com/science/Rutherford-model

  • Bohr’s Orbit Model

    Niels Bohr (Danish physicist) used a model based on the hydrogen atom to show that the energy of the electrons is quantized. Bohr’s model put forth two postulates that sum up most of his model:
    1. The electron is able to revolve in certain stable orbits around the nucleus without radiating any energy
    2. Electrons can only gain and lose energy by jumping from one allowed orbit to another. Reference:
    Niels Bohr interview 1962 Session III https://www.aip.org/history-programs/niels-bohr-library/.