Interactive Periodic Table: 118 Elements & Properties

How to use this interactive periodic table

Search by element name, symbol, or atomic number to jump directly to an element.
Choose a view mode to color the table by category, block, state of matter, electronegativity, atomic radius, density, discovery year, toxicity, and other properties.
Change the tile data to compare atomic mass, electron configuration, oxidation states, ionization energy, melting point, boiling point, or other values without leaving the table.
Use the temperature control to see which elements are solid, liquid, or gas at the selected temperature.
Open any element tile to view a dedicated element page with key facts, physical properties, atomic structure, uses, and related elements.

Explore periodic trends

The table is built to make periodic trends visible, not just list element symbols. Switch between electronegativity, atomic radius, ionization energy, density, melting point, boiling point, valence electrons, oxidation states, and discovery year to compare how properties change across periods and down groups.

Data sources and accuracy

Element values are presented as an educational reference with units shown wherever practical. Many atomic and physical properties vary by isotope, temperature, pressure, or source convention, so critical scientific or publishing work should verify constants against primary references such as IUPAC, NIST/CODATA, or PubChem.

Periodic Table FAQ

What is the periodic table?
The periodic table is a chart of the chemical elements arranged by atomic number. Elements in the same column often share similar chemical behavior because their outer electron structures are related.

Who created the modern periodic table?
Dmitri Mendeleev is credited with the first widely accepted periodic table in 1869. His version grouped the known elements by recurring properties and left gaps for elements that had not yet been discovered.

Why are lanthanides and actinides shown separately?
They are usually displayed below the main table to keep the layout compact and readable. They still belong in the main sequence of elements, but the split format makes the table easier to scan.

How many elements are on the periodic table?
There are 118 confirmed elements. They run from hydrogen, which has atomic number 1, to oganesson, which has atomic number 118.

Why is the periodic table arranged by atomic number?
Atomic number reflects the number of protons in the nucleus and gives the modern order of the elements. This arrangement explains the repeating pattern of chemical properties better than older mass-based systems.

What is electron configuration and how do you read it?
Electron configuration describes how electrons are distributed across an element's energy levels and subshells. It is written as a series of subshell labels with superscripts indicating electron counts — for example, carbon is 1s² 2s² 2p². The outermost electrons (valence electrons) determine most of the element's chemical behavior.

What are oxidation states?
Oxidation states (also called oxidation numbers) represent the hypothetical charge an atom would carry if all its bonds were ionic. They are used to track electron transfer in chemical reactions and to balance redox equations. Many elements have multiple common oxidation states — iron, for instance, commonly appears as +2 and +3.

What is electronegativity?
Electronegativity measures how strongly an atom attracts electrons in a chemical bond. On the Pauling scale, fluorine is the most electronegative element at 3.98. Electronegativity generally increases across a period (left to right) and decreases down a group. The difference in electronegativity between two bonded atoms indicates whether the bond is covalent, polar covalent, or ionic.

What is the difference between metals, metalloids, and nonmetals?
Metals (the large left and center portion of the table) conduct electricity, have a metallic luster, and are generally malleable. Nonmetals (upper right) are poor conductors and tend to gain electrons in reactions. Metalloids (a diagonal band between the two) share properties of both — silicon and germanium, for example, are semiconductors. The exact boundary between categories is defined by convention and varies slightly by source.

Can I download the periodic table as a PDF?
Yes. There is a download button on the periodic table page that exports the current view as a PDF. The download captures the layout with whichever property or color scheme you have selected, so you can customise the view before saving.

» Periodic Table

Quick study modes

How to use this interactive periodic table

Explore periodic trends

Data sources and accuracy

Periodic Table FAQ

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