About the Periodic Table
Explore all 118 chemical elements. Click an element to see its atomic mass, group, period, block, category, electron configuration and electrons per shell, or search and highlight groups like halogens and noble gases.
Key features
- All 118 elements
- Atomic mass, group and period
- Electron configuration and shells
- Colour-coded categories
- Search by name, symbol or number
- Highlight any element group
Explore every element
The periodic table organizes all known chemical elements by atomic number and electron structure. Click any element to see its key facts, or highlight a whole family, such as the noble gases, to see where it sits.
Element categories
| Category | Examples | Typical properties |
|---|---|---|
| Alkali metals | Li, Na, K | Soft, very reactive with water |
| Alkaline earth metals | Mg, Ca | Reactive, form +2 ions |
| Transition metals | Fe, Cu, Au | Hard, conduct electricity, colourful compounds |
| Metalloids | B, Si, Ge | Between metals and nonmetals; semiconductors |
| Halogens | F, Cl, Br, I | Very reactive nonmetals, form salts |
| Noble gases | He, Ne, Ar | Unreactive gases with full outer shells |
Related tools
Quadratic equation solver, scientific calculator and unit converter.
How to use the Periodic Table
- Click any element to see its details.
- Search by name, symbol or atomic number.
- Click a category, such as Halogen, to highlight that group.
- Read the atomic mass, group, period and electron configuration below the table.