Limitations of Bohr's Model and Quantum Mechanics

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Limitation to Bohr’s model of the atom

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Bohr's model cannot accurately describe electron behavior in atoms with more than one electron and does not account for electron orbitals.

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Atomic structure based on quantum mechanics

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Atomic structure is based on quantum mechanics, which explains the behavior of electrons in terms of probabilities and wave functions.

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Bohr’s model worked for which element?

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Hydrogen

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What concept about electron movement was no longer accepted in Bohr’s model?

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The idea that electrons “orbit” the nucleus.

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When it became apparent that Bohr’s model was flawed, a new approach was needed. This approach is known as:

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Quantum Mechanics

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Louis de Broglie (1924)

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Suggested that all matter, including electrons, could be described as having wave-like properties.

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Wave Distribution Concept

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Envisioned a wave distributed around a circle, where the orbits are not circular.

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Orbital

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The region (probability cloud) where electrons are most likely to be found.

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Electron Probability Distribution - electron clouds

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Visual representation of electron probability distributions for different orbitals, including 2p and 3d orbitals.

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Heisenberg's Uncertainty Principle

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It is impossible to know both the position and velocity of an electron in an atom at the same time. You can only know one with leaving the other uncertain.