About 1926 Louis de Broglie, Erwin Schrödinger, and Werner Heisenberg Electron Cloud Model Louis de Broglie Erwin Schrödinger Werner Heisenberg
de Broglie: Electrons have wavelike properties. Heisenberg: It is impossible to know both the location of a particle and how a particle is moving. With small particles (like electrons) this means we will never be able to say exactly where an electron is located. Schrödinger: Developed mathematical equations to predict the most likely location of electrons. The Big Ideas
Electrons exist in certain energy levels as suggested by Bohr but they are not circular orbits. Probability is used to predict where electrons can be found. Electrons are instead found in orbitals. An orbital is a region around nucleus where you are most likely to find an electron. An electron cloud is a visual model of the most likely locations to find an electron around an atom. The Electron Cloud Model