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

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Features of the Scanning Tunneling Microscope

The scanning tunneling microscope (STM) invented by Heinrich Rohrer and Gerd Binnig in the 1980s still manages to do a great job today and competes with more advanced microscope types.

The scanning tunneling microscope is used for studying the surface atoms that are found on various materials. The device is based on a complex process of "tunneling" electrons between the material and the tip of a probe.

Doublet

Two peaks or bands of about equal intensity appearing close together on a spectrogram.

Periodicity

Regular periodic variations of properties of elements with atomic number (and position in the periodic table).

Metallurgy

Refers to the overall processes by which metals are extracted from ores.

Hydrate Isomers

Isomers of crystalline complexes that differ in whether water is present inside or outside the coordination sphere.

Alkylbenzene

A compound containing an alkyl group bonded to a benzene ring.

Intermolecular Forces

Forces between individual particles (atoms, molecules, ions) of a substance.

Precipitate

An insoluble solid formed by mixing in solution the constituent ions of a slightly soluble solution.

Standard Molar Enthalphy of Formation

The amount of heat absorbed in the formation of one mole of a substance in a specified state from its elements in their standard states.

Peroxide

A compound containing oxygen in the -1 oxidation state. Metal peroxides contain the peroxide ion, O22