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Links to selected scientific data
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Metric/SI |
The SI, in-depth information on the modern metric system |
NIST |
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Mathematical |
Values with descriptions by topic or
value |
Mathsoft
Software company |
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Elementary
particle |
Properties, information, databases |
Particle Data Group |
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Atomic |
Spectroscopic data including atomic energy levels, wavelengths, transition probabilities |
NIST |
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Nuclear |
Relative atomic masses and related nuclear data |
AMDC
Centre de spectrométrie nucléaire et de spectrométrie de masse |
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Chemical |
Search for many different chemical properties |
ChemFinder
CambridgeSoft Software company |
NIST WebBook of thermochemistry, spectra, etc |
NIST |
Periodic Table |
WebElements
University of Sheffield , UK |
Mineral formulas, classifications,
pictures |
Athena Project |
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Astronomical |
Planet and moon statistics from "The Nine Planets" |
SEDS
Lunar and Planetary Laboratory, Univ. Arizona, Tucson, USA |
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Unit conversions |
Links to non-endorsed on-line unit conversions |
Outside of NIST |
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See also
Values of the constants
Searchable bibliography on the constants
Background information related to the constants
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