Periodic table. All 118 elements, no textbook required.

How to use the Periodic Table

This is an interactive periodic table of all 118 elements, with the data built into the page. You can search by name, symbol or atomic number, color the table by category, phase or electron block, and open any element for its mass, electron configuration, electronegativity and discovery year. It works as a quick reference for students, teachers and anyone checking a value.

Step by step

1. 1
   Find an element

   Type in Search elements: a name or part of one, an exact symbol such as Fe, or an atomic number such as 26. Elements that do not match fade out, and when only one matches its details open by themselves.

2. 2
   Jump to the first match

   Press Enter in the search box to select the first matching element, in atomic number order, and scroll it into view. Press Escape to clear the search.

3. 3
   Change the coloring

   Use Color by to switch between Category, Phase and Blocks. The legend under the table changes to match the view.

4. 4
   Open the details

   Hover over a cell for a quick tooltip with mass, category and phase, or click it to fill the side panel with atomic number, atomic mass, group, period, block, phase at STP, electron configuration, electronegativity and discovery year.

5. 5
   Copy or export

   Press Copy element summary to copy the selected element as plain text. Download JSON or Download CSV saves the full 118 element dataset, whatever the search is showing.

Reading the result

• The counter above the table reads 118 elements, or the number of matches while you search. Searching fe gives 2 matches: iron by its symbol and fermium by its name.
• Atomic mass is in unified atomic mass units (u). A number in square brackets, such as [98] for technetium, is a mass number for an element with no stable isotope.
• A dash means the value is not in the data, for example no Pauling electronegativity for helium, neon and argon, and no group number for most lanthanides and actinides.
• Elements 104 and above show phase Unknown, and from 109 the electron configuration is marked predicted.
• Oxygen as an example: atomic number 8, mass 15.999 u, group 16, period 2, p-block, gas, [He] 2s2 2p4, electronegativity 3.44, discovered 1774.

Tips and common mistakes

• Short searches match a lot. A single letter such as c matches carbon by its symbol plus every name containing c. Enter then picks the lowest atomic number among the matches, so Ba selects cobalt before barium; type the full name or the atomic number when you want one element.
• On a phone, swipe the table sideways. Lanthanides (57 to 71) and actinides (89 to 103) sit in the two rows below the main table.
• Copy element summary needs a selected element. Click a cell first, or search until one element matches.
• The CSV puts masses and electron configurations in quotes, so spreadsheet apps keep values like [98] and [He] 2s2 2p4 as text.

Privacy and limits

All 118 elements are stored in the page itself, so searching, coloring and exporting happen in your browser with no requests to any server. Nothing is saved, and the JSON and CSV files are created on your device.

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