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Visual Elements Periodic Table
From the Royal Society of Chemistry, this table provides a visual interpretation of the Table of Elements.
Online periodic table.
A periodic table with links to overviews of each element.
An interactive table of the elements with data and properties.
Periodic Table Live
Explore a broad range of information about the elements, their reactions, their properties, their structures and their histories.
Great information on each elements' discovery, properties, abundance, common uses, history, and recent research.
Usually spectroscopy is devoted to identifying elements and compounds and elucidating atomic and molecular structure by measuring the radiant energy absorbed or emitted by a substance at characteristic wavelengths of the electromagnetic spectrum on excitation by an external energy source.
NIST Elemental Data Index
Scientific information for specific elements.
NIST Physical Reference Data
Contains: Physical Constants; Atomic Properties of the Elements; Atomic and Molecular Spectroscopic Data; Atomic and Molecular Data; X-ray and Gamma Ray Data; Radiation Dosimetry Data; Nuclear Physics Data; and, Condensed Matter Physics Data.