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A favourable interaction of two electrons with opposite m , values in the same orbital.

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Osmotic Pressure

The hydrostatic pressure produced on the surface of a semipermable membrane by osmosis.

Pairing

A favourable interaction of two electrons with opposite m , values in the same orbital.

Endothermic

Describes processes that absorb heat energy.

Differential Thermal Analysis (DTA)

A technique for observing the temperature, direction, and magnitude of thermally induced transitions in a material by heating/cooling a sample and comparing its temperature with that of an inert reference material under similar conditions.

Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

Alkenes (Olefins)

Unsaturated hydrocarbons that contain one or more carbon-carbon double bonds.

Background Radiation

Ratiation extraneous to an experiment. Usually the low-level natural radiation form cosmic rays and trace radioactive substances present in our environment.

Why do copper products change color, and what is the name of the process?

Probably, every person wants to know, why over time the copper turns green and becomes bloomed. This is easy to explain: that film is called patina.

Dimer

Molecule formed by combination of two smaller (identical) molecules.

Sigma Orbital

Molecular orbital resulting from head-on overlap of two atomic orbitals.