Quantum Mechanics

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Scientists and Their Discoveries

Planck: Quantum Theory. Electromagnetic energy is quantized. Energy changes do not occur smoothly but rather in steps (walking up a ramp vs. walking up steps). E=hv

Bohr: Using the quantum theory, he predicted that electrons orbit the nucleus from specific locations. Explained the hydrogen atom’s line spectrum.

de Broglie: All matter has wave characteristics. Correlation between wave and particle characteristics are given by the de Broglie equation:
λ = h/mv (an object has a characteristic wavelength that depends on its momentum)

Heisenberg: Impossible to know both position and momentum of an electron simultaneously; therefore, the electron orbital is a probability function describing the possibility that an electron will be found in a region of space.