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The Chemical Glossary currently has 651 chemical entries. You may search the Chemical Glossary by entering the keyword in the search box or by browsing the entire chemical glossary by letter in alphabetical order.

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Nodal Plane

A region in which the probability of finding an electron is zero.

 

Law of Conservation of Matter and Energy

The total amount of matter and energy available in the universe is fixed.

Lanthanides

Elements 58 to 71 (after lanthanum).

Handmade crystal glass as a work of art

In order for the colored crystal to open in all its beauty and sparkle with every face natural light is required. Handmade crystal glass has specific tactile and aesthetic properties - it is pleasant to touch, it seems to radiate heat. To appreciate the quality and beauty of such things, of course, it is not enough to look at the picture.

Compound

A substance of two or more elements in fixed proportions. Compounds can be decomposed into their constituent elements.

Molecular Equation

Equation for a chemical reaction in which all formulas are written as if all substances existed as molecules, only complete formulas are used.

Ion Product for Water

Equilibrium constant for the ionization of water, Kw = [H3O+][OH-] =1.00 x 10-14 at 25 °C.

Ester

A Compound of the general formula R-C-O-R1 where R and R1 may be the same or different, and may be either aliphatic or aromatic.

Fluorescence

Absorption of high energy radiation by a substance and subsequent emission of visible light.

Vapor Pressure

The particle pressure of a vapor at the surface of its parent liquid.