Final answer:
The Lewis atomic model proposed that electrons are arranged around the nucleus in specific energy levels, which was further detailed by Niels Bohr to include allowed circular orbits. Bohr's model introduced the concept that these orbits, or energy levels, are quantized and designated with the quantum number 'n'. Lewis diagrams also show valence electrons around an atom's symbol, helping to visualize bonding.
Step-by-step explanation:
The Lewis atomic model suggests that electrons are arranged around the nucleus in specific energy levels, represented as rings or shells. This model of atomic structure was expanded upon by Niels Bohr in 1913. Bohr's model for the hydrogen atom incorporated quantum concepts and classical mechanics to propose that electrons move in fixed orbits, or quantized energy levels, around the nucleus. Each orbit represents a different energy level and is denoted by the principal quantum number 'n'. Bohr's model of the atom was a significant step forward from previous models, like the cubic model and the Saturnian model, and it introduced the idea that electrons could only exist in certain allowed energy states.
Notably, in Bohr's model, an electron in a hydrogen atom moves around the nucleus in circular orbits centered at the nucleus. The orbits are allowed to have only certain radii, which are in specific energy levels or shells designated by a number and the symbol 'n'. This concept also applies to more complex atoms, where electrons occupy regions of space, known as orbitals, around the nucleus based on their energy levels. This model was pivotal in explaining phenomena such as the discrete emission spectra of hydrogen.
Lewis diagrams, also known as Lewis electron dot diagrams, are a representation that shows the valence electrons as dots around the chemical symbol of an atom, thus giving us a visual representation of the valence electron arrangement in atoms and aiding in the understanding of chemical bonding and molecule formation.