The periodic table
The periodic table shows 118 elements, including metals (blue), nonmetals (red), and metalloids (green).
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Metalli, semimetalli, nonmetalli."
http://commons.wikimedia.org/wiki/File:Metalli,_semimetalli,_nonmetalli.png
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