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The Evolution of the Atomic Theory

Bohr-1922

bohr_niels.jpg

He mathematical worked out a model of a hydrogen atom. This explained the emission line spectrum of only certain wavelengths (certain colours) using Planck's quantum concept. The Bohr atom Model: electron energy levels are fixed at certain amounts or distances from nucleus; electron transitions from higher to lower levels result in separate wavelengths of emitted light. Bohr conjectured that an atom could exist only in a discrete set of stable energy states.

Here we see Bohr's model of the atom.

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Bohr also contributed to the clarification of the problems encountered in quantum physics

Chemirty 11 project The Evolution of the Atomic Theory