Interactive Periodic Table

Explore the building blocks of the universe.

Select an element to see its details.

Alkali Metal

Alkaline Earth Metal

Lanthanide

Actinide

Transition Metal

Post-Transition Metal

Metalloid

Nonmetal

Noble Gas

Unknown

How to Use the Interactive Periodic Table

Select an element to see its name, atomic mass, category, and discovery info.
Use color legend to quickly identify families (alkali, alkaline earth, transition metals, nonmetals, noble gases).
Trends to explore: atomic radius decreases across a period; ionization energy generally increases across a period and decreases down a group.

Example Questions:

Which group contains the most reactive metals? — Alkali metals (Group 1).
Why are noble gases unreactive? — They have full valence shells.
Which has higher electronegativity, O or S? — Oxygen (higher, being higher in the group).