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Quantum Chemistry Basics
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De Broglie Hypothesis
Suggests that particles have wave-like properties, with wavelength given by
Quantum Coherence
Phenomenon where a single quantum state is maintained over a period of time, crucial for quantum computing and superconductivity.
Quantum Superposition
Principle that a quantum system can be in multiple states at once until it is observed. Crucial for quantum computing and interference phenomena.
Energy Quantization
Electrons in atoms have quantized energy levels rather than a continuous range. It explains atomic spectra and chemical behavior.
Wave-Particle Duality
Particle-like behavior of waves and wave-like behavior of particles. Fundamental concept of quantum mechanics that has significant implications for understanding the behavior of electrons in atoms.
Quantum Tunneling
A quantum phenomenon where particles pass through a barrier that they classically couldn't, significant in nuclear fusion and semiconductor physics.
Quantum Entanglement
A quantum mechanical phenomenon where particles become connected, such that the state of one instantaneously affects the state of another, regardless of distance between them.
Planck's Constant
A fundamental constant of nature that sets the scale of quantum effects with the value . It is crucial in the quantization of energy levels.
Pauli Exclusion Principle
A principle in quantum mechanics that no two electrons in an atom can have the same set of quantum numbers, explaining the structure of the periodic table and chemical bonding.
Schrodinger Equation
A mathematical equation that describes how the quantum state of a quantum system changes with time. It's central to quantum mechanics.
Born Rule
A postulate of quantum mechanics that gives the probability that a measurement on a quantum system will yield a particular result. It states that this probability is proportional to the square of the amplitude of the wavefunction.
Quantum Decoherence
The loss of quantum coherence, typically due to interaction with the environment. It explains the transition from quantum to classical behavior and is a challenge for quantum computing.
Quantum Numbers
Set of numbers that describe the unique quantum state of an electron in an atom. They include the principal number , angular momentum , magnetic number , and spin number .
Wavefunction
A mathematical function that describes the quantum state of a system. The square of its absolute value represents the probability density of finding a particle at a certain location.
Heisenberg Uncertainty Principle
States that it is not possible to simultaneously know the exact position and momentum of a particle. It represents a fundamental limit on the precision of measurements.
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