Explore every chemical element from hydrogen to oganesson. The table is coloured by type: alkali metals, transition metals, halogens, noble gases and more. Tap any element for its atomic number, atomic mass, group, period, block and state at room temperature, or search by name, symbol or number.
loading toolHow to use the periodic table
- Tap any element to see its details.
- Type a name, symbol or number in the search box to find it.
- Tap a colour in the legend to highlight one type of element.
Good to know
- On a phone, scroll the table sideways.
- Groups run down the columns (1–18); periods are the rows (1–7).
Questions
Which atomic masses are used?
Standard atomic weights (IUPAC, abridged). For elements with no stable form, the mass number of the most stable known isotope is shown in [brackets].
Why are two rows shown separately below?
The lanthanides (57–71) and actinides (89–103) belong in periods 6 and 7; they are printed below to keep the table a sensible width.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
