Wave Mechanical Model

By the mid-1920s it had become apparent that the Bohr model was incorrect. Scientists needed to pursue a totally new approach. Two young physicists, Louis…

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Van der Waals Force

Van der Waals Forces are the weak forces which contribute to intermolecular bonding between molecules. Molecules inherently possess energy and their electrons are always in motion,…

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Valence Electron

A valence electron is an electron that is the most likely to be involved in a chemical reaction. They are typically the electrons with the…

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Valence Bond Theory

Heitler and London introduced this theory. This is primarily based on the concepts of atomic orbitals, electronic configuration of elements, the overlapping of atomic orbitals,…

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Vacancy Diffusion

Vacancy diffusion is a diffusion process whereby the random thermally-activated movement of atoms in a solid results in the net transport of atoms. For example,…

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Unsaturated

In chemistry, the term “unsaturated” usually refers to one of two things. When referring to chemical solutions, an unsaturated solution is able to dissolve more solute….

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Terminal solid solution

Terminal solid solution is A solid solution that exisits over a composition range extending to either composition extremity of a binary phase diagram.

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Superheating

In physics, superheating (sometimes referred to as boiling retardation, or boiling delay) is the phenomenon in which a liquid is heated to a temperature higher…

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Supercooling

Supercooling is the process of cooling a liquid or a gas below its freezing point without it becoming a solid. Supercooling during the liquid-solid phase…

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Substitutional Solid Solution

A substitutional solid solution is a mixture of two types of atoms in which one atom can replace the other type of atom. Sterling silver…

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