The Interactive Chemistry Encyclopedia
Explore every element, master the periodic table, and dive into the science of matter.
Today's Element
Periodic Table
View full table →Element Categories
Alkali Metal
Highly reactive metals in Group 1 of the periodic table. They have β¦
Alkaline Earth Metal
Reactive metals in Group 2 of the periodic table. They have two β¦
Transition Metal
Metals in Groups 3-12 with partially filled d-orbitals. They exhibit variable oxidation β¦
Post-Transition Metal
Metals to the right of transition metals in the periodic table. They β¦
Metalloid
Elements with properties between metals and nonmetals. They are semiconductors and play β¦
Nonmetal
Elements that lack metallic properties. They are generally poor conductors of heat β¦
Halogen
Highly reactive nonmetals in Group 17 of the periodic table. They have β¦
Noble Gas
Inert gases in Group 18 with full valence shells. They have very β¦
Lanthanide
Rare earth elements with atomic numbers 57-71. They are characterized by the β¦
Actinide
Radioactive elements with atomic numbers 89-103. They are characterized by the filling β¦
Unknown Properties
Elements with insufficiently characterized properties. These are typically superheavy elements that have β¦