ARTICLES AND TABLES

Alphabetical list of chemical elements

The elements of the periodic table sorted by name, symbol or atomic number.

Fundamental physical constants

CODATA Recommended Values of the Fundamental Physical Constants: 2006.

Solubility product constants

Solubility product constant (K_sp) (or the solubility product) is the product of the molar concentrations of the constituent ions, each raised to the power of its stoichiometric coefficient in the equilibrium equation.

Electronic configurations of the elements

The electron configuration describes the distribution of electrons in the shell of an atom at various energy states. This is described by the occupied sub-shells. The shell number is followed by the letter of the sub-shell, with the number of electrons in the shell indicated by a superscript number.

Naming of elements of atomic numbers greater than 100

In 1978 IUPAC Commission on the Nomenclature of Inorganic Chemistry decided that it is necessary to have a systematic naming for the elements with atomic number Z > 100, even for those which had not been discovered.

Illustrated history of rare earth elements

Rare earth elements (REE) are a collection of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides plus scandium and yttrium.

SI - The International system of units

The base quantities used in the International System of Units are length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity. The corresponding base units of the SI were chosen by the CGPM to be the metre, the kilogram, the second, the ampere, the kelvin, the mole, and the candela.

JOC-approved abbreviations of chemical compounds

Standard abbreviations and acronyms of chemical compounds used by the Journal of Organic Chemistry (JOC) require no definition.

NFPA 704 standard

NFPA hazard diamond identifies the hazards of a material and the degree of severity of the health, flammability, and instability hazards.

Webmaster Tools

Hexadecimal color codes

Hexadecimal color codes - quickly find HTML color codes for your website.

HTML color names

The table of color names and their corresponding RGB (Red, Green, Blue) values.

Writing mathematical and chemical equations on the Web with CSS

Writing mathematical and chemical equations (double arrows, oxidation numbers, fractions) on the Web with CSS.

Character entity references in HTML

Character entity references for international characters, symbols, mathematical symbols, and Greek letters.

Unicode UTF-8 encoding

Tables with special characters and their corresponding UTF-8 codes that are contained within each supported language's. The Unicode Standard assigns a code point (a number) to each character in every supported script.