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What is quantum theory?
What is quantum chemistry?
What is quantum theory of atoms in molecules?
What is quantum physics?
Jan 30, 2023 · Quantum theory is simply a new way of looking at the world. The rules as they apply to us don't apply to the tiny particles that quantum theory deals with. However, it was a breakthrough that led physicists to discover more about the world of physics and to understand our own world better, starting from the tiny particles of matter that are its ...
- Wave-Particle Duality
In 1923, Louis de Broglie, a French physicist, proposed a...
- Multi-electron Atoms
Figures 3.1, 3.2, and 3.3 show that the lower the energy...
- Unit 1. Quantum Chemistry
Quantum Chemistry. In this unit, we describe how electrons...
- Wave-Particle Duality
Quantum chemistry, also called molecular quantum mechanics, is a branch of physical chemistry focused on the application of quantum mechanics to chemical systems, particularly towards the quantum-mechanical calculation of electronic contributions to physical and chemical properties of molecules, materials, and solutions at the atomic level. [1]
The quantum theory of atoms in molecules (QTAIM), introduced by Richard Bader and co-workers in the 1970s, is a methodology that provides unambiguous definitions for important concepts like a chemical bond, chemical structure, local or atomic properties in a system, etc.
The meaning of QUANTUM THEORY is a theory in physics based on the concept of the subdivision of radiant energy into finite quanta and applied to numerous processes involving transference or transformation of energy in an atomic or molecular scale.
Applications. In principle, solve Schrödinger Equation. Not possible for many-electron atoms or molecules due to many-body problem. Requires two levels of approximation. Born-Oppenheimer Approximation. Assumes we can study behavior of electrons in a field of frozen nuclei. Correct H: Hexact = Tel + Vel-el + Tnuc + Vnuc-nuc + Vel-nuc.
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Introduction to the quantum mechanical model of the atom: Thinking about electrons as probabilistic matter waves using the de Broglie wavelength, the Schrödinger equation, and the Heisenberg uncertainty principle. Electron spin and the Stern-Gerlach experiment. Key points.
