⚛️ Interactive Periodic Table
Click any element to see its properties. All 118 elements included.
About the Periodic Table
The periodic table organizes all 118 known chemical elements by atomic number, electron configuration, and recurring chemical properties. Elements in the same column (group) typically have similar chemical behavior.
Element Categories
- Alkali Metals: Group 1 — Highly reactive soft metals (Li, Na, K…)
- Alkaline Earth Metals: Group 2 — Reactive metals (Be, Mg, Ca…)
- Transition Metals: Groups 3–12 — Hard, dense metals with variable oxidation states
- Post-Transition Metals: Softer metals like Al, Ga, Sn, Pb
- Metalloids: Elements with mixed properties (B, Si, Ge, As…)
- Nonmetals: H, C, N, O, P, S, Se
- Halogens: Group 17 — Highly reactive nonmetals (F, Cl, Br…)
- Noble Gases: Group 18 — Inert gases (He, Ne, Ar…)
- Lanthanides: Rare earth elements (atomic numbers 57–71)
- Actinides: Radioactive metals (atomic numbers 89–103)
FAQ
How many elements are in the periodic table?
The periodic table contains 118 confirmed elements, from Hydrogen (1) to Oganesson (118).
What are element categories?
Elements are categorized as alkali metals, alkaline earth metals, transition metals, post-transition metals, metalloids, nonmetals, halogens, noble gases, lanthanides, and actinides.
What is the most abundant element in the universe?
Hydrogen is the most abundant element in the universe, making up about 75% of all normal matter by mass.