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Chemical Element - Origins, Definition, Facts
WebElements Periodic Table » Periodicity » Standard atomic weights » Periodic table gallery
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Chemical element - Wikipedia
Understanding Element Names and Symbols
Element List - Element Names, Symbols, and Atomic Numbers
Scientists Say: Periodic table
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File:Periodic Table - Atomic Properties of the Elements.png - Wikimedia Commons
Difference Between Atoms and Elements (With Examples) | YourDictionary
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Atomic Number 4 Element Facts
chemical element - Kids | Britannica Kids | Homework Help
Atomic number, defined in plain English with examples. Difference between atomic number and atomic mass explained.
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