Chemistry · Cross-level topic
Periodic table
Groups, periods, and trends — the chemist’s map of the elements.
Alkali Metal
Alkaline Earth
Transition Metal
Post-transition Metal
Metalloid
Non-metal
Halogen
Noble Gas
Lanthanide
Actinide
Lanthanides *
Actinides **
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Click any element to explore its properties, orbital animation, and uses.
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