Interactive Periodic Table
An interactive periodic table of all 118 elements. Click any element for its atomic mass, electron configuration, electronegativity, melting and boiling points, density, state, discovery year and discoverer — and filter by period, group, block, category or state.
This tool runs entirely in your browser.
How to use the Interactive Periodic Table
- 1Click or tap an element (or Tab to it and press Enter) to open its details.
- 2Search by name, symbol or atomic number — matches are outlined and the rest fade.
- 3Filter by period, group, block, category or state at room temperature, or click a category in the legend.
- 4On a phone, scroll the table sideways or switch to the list view.
What is the Interactive Periodic Table?
The periodic table arranges the elements by atomic number (the number of protons) into 7 periods (rows) and 18 groups (columns). Elements in the same group have the same number of outer electrons, so they behave alike: the alkali metals in group 1 all react with water, the noble gases in group 18 hardly react at all. The two rows below the table — the lanthanides and actinides — are the f-block, pulled out so the table stays a readable width.
Atomic masses are IUPAC standard atomic weights. Radioactive elements without a stable isotope have no standard weight, so the table shows the mass number of the longest-lived isotope in brackets, such as [97] for technetium-97 or [294] for oganesson. Melting and boiling points are in kelvin and degrees Celsius; values for the heaviest elements are predictions or unknown because only a few atoms have ever been made.
All data is built into the page from the PubChem periodic table (a public-domain US government source), so it works offline and nothing is looked up as you browse.
Frequently asked questions
How many elements are there?
118, from hydrogen (1) to oganesson (118). The last four — nihonium, moscovium, tennessine and oganesson — were named in 2016.
Why are some atomic masses in brackets?
Elements such as technetium, promethium and everything after bismuth (except thorium, protactinium and uranium) have no stable isotopes, so there is no standard atomic weight. The bracketed number is the mass number of the longest-lived isotope.
Which elements are liquid at room temperature?
Only mercury and bromine. Caesium, gallium and francium melt just above room temperature, so they can turn liquid on a hot day or in your hand (gallium).
What are the s, p, d and f blocks?
They name the electron subshell being filled: s-block (groups 1–2 plus helium), p-block (groups 13–18), d-block (transition metals, groups 3–12) and f-block (lanthanides and actinides).
Is the Interactive Periodic Table free and private?
Yes. The Interactive Periodic Table is free, needs no account, and runs entirely in your browser. What you type is never sent to a server or stored.
Related tools
All reference & learning →- Molar Mass CalculatorMolar mass and percent composition of any chemical formula.
- Number Base ConverterBinary, octal, decimal and hex — any base 2–36.
- Temperature ConverterConvert Celsius to Fahrenheit, Fahrenheit to Celsius, Kelvin.
- Weight ConverterConvert kg to lbs, grams to ounces, stone to kg.
- Math Symbols ReferenceCopy math symbols with their names, Unicode and LaTeX.
- Country ExplorerCapitals, ISO codes, currencies, calling codes and more for every country.