Source Knol: Periodic Table of the Elements
Summary
A table of all the known elements in the Universe displayed in a tabular method that groups common elements together. They are in order from lowest atomic number (upper left) to highest atomic number (lower right). Each element typically has in its box the name of the element, the element's symbol, the atomic number (the number of protons in the atom) and the atomic weight measured in amu (atomic mass units, 1 atomic mass unit = 1.660 538 782(83) × 10-27 kilograms. It is one twelfth of the mass of an isolated 12C atom).
For more details and the periodic table visit
Source Knol: Periodic Table of the Elements
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