Atomic Models

Bohr’s model, quantum mechanical model of the atom

Bohr's Model of the Atom

  1. Proposed by Niels Bohr in 1913.
  2. Based on Rutherford’s model and Planck's quantum theory.
  3. Electrons revolve around the nucleus in fixed circular paths called orbits or energy levels.
  4. These energy levels are represented as n = 1, 2, 3, ... (principal quantum numbers).
  5. Each orbit has a fixed amount of energy, and electrons do not radiate energy while in a stable orbit.
  6. Electrons can transition betwee

Dalton’s atomic theory, Thomson’s model, Rutherford’s model

Dalton's Atomic Theory

  1. Proposed by John Dalton in 1803.
  2. It was the first scientific theory to describe the nature of matter in terms of atoms.
  3. Matter is made up of small, indivisible particles called atoms.
  4. Atoms of a given element are identical in size, mass, and other properties.
  5. Atoms of different elements differ in size, mass, and other properties.
  6. Atoms cannot be created, divided, or destroyed during chemical reactions.
  7. Atoms combine in simple whole-number ratios to form
Atomic Models