About this tool
- Interactive layout of all 118 IUPAC-recognized elements (H to Og)
- Color-coded by element family: alkali metals, alkaline earth, transition metals, lanthanides/actinides, post-transition, metalloids, nonmetals, halogens, noble gases
- Click any cell to see the symbol, name, atomic number, atomic mass, period, group, category, and discovery year
- Mobile-friendly: scroll horizontally on small screens to see all 18 columns
Periodic table groups
- Groups 1-2 (s-block): alkali and alkaline earth metals
- Groups 3-12 (d-block): transition metals — also includes lanthanides and actinides
- Groups 13-18 (p-block): from boron family through noble gases
- Periods (rows): 1 through 7, each row fills one principal electron shell