Listing of amino acids, abbreviation, linear structure and 3-D molecular model (German labels).
The Commission on Atomic Weights and Isotopic Abundances (CAWIA), part of the International Union of Pure and Applied Chemistry (IUPAC), provides the latest measures of evaluated atomic weight and isotopic abundance data.
Converts more than 5,000 units and 50,000 conversion measures related to length/distance, temperature, speed, volume, weight/mass, area, force, power, energy, pressure, etc.
Converts area, bits/bytes, density, energy, force, length, mass, power, pressure, speed, temperature and volume units.
Quick pick an element from the colorful periodic table. Each element’s record includes general properties, states, energies, oxidation and electrons, appearance, reactions, conductivity and abundance information.
The first periodic table on the Web that provides essential background information; data on the element’s crystallography, electronic, physical, and nuclear properties; isolation; usage; and its compounds. Images of the element are available when possible.