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Secondary voltaic cell used in most automobiles.

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  • Varieties of garnet minerals

    The most famous type of garnet stone is pyrope (flaming). This is the "oldest of garnets", with a dense red color, similar to the grain of an edible garnet. Pyrope has a variety called rhodolite - a stone of dense pink or pink-purple color, which sometimes has the alexandrite effect and is used in...

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    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...

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Amine

Derivatives of ammonia in which one or more hydrogen atoms have been replaced by organic groups.

Chemical Bonds

The attractive forces that hold atoms together in elements or compounds.

Half-Cell

Compartment in which the oxidation or reduction half-reaction occurs in a voltaic cell.

Substitution Reaction

A reaction in which an atom or a group of atoms is replaced by another atom or group of atoms.

Dissociation

In aqueous solution, the process in which a solid ionic compound separates into its ions.

Differential Scanning Calorimetry (DSC)

A technique for measuring the temperature, direction, and magnitude of thermal transitions in a sample material by heating/cooling and comparing the amount of energy required to maintain its rate of temperature increase or decrease with an inert reference material under similar conditions.

Lanthanides

Elements 58 to 71 (after lanthanum).

Isotopes

Two or more forms of atoms of the same element with different masses, atoms containing the same number of protons but different numbers of neutrons.

Free Energy Change

The indicator of spontaneity of a process at constnt T and P. If delta-G is negative, the process is spontaneous.

Can water burn?

It’s known that water consists of atoms of molecules of oxygen and hydrogen. Since any compound with oxygen indicates the ability of the substance to burn, water is no exception. Thus, water has a surprising property of already "burnt out" compound.