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Scientific Data

Amino Acids 

Listing of amino acids, abbreviation, linear structure and 3-D molecular model (German labels).


Standard Atomic Weights of the Elements, 2003 

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.


Conversion Tables


Online Conversion 

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.


Digital Dutch 

Converts area, bits/bytes, density, energy, force, length, mass, power, pressure, speed, temperature and volume units.


Periodic Table



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.


Web Elements 

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.

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