Click any element for the full picture.
Search by name, symbol or atomic number, filter by category or state of matter, then tap an element to see its mass, electron configuration, electronegativity and more.
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Find any element in three moves.
No manual required — but here's the entire flow.
Search or filter
Type a name, symbol or atomic number into the search box, or narrow the table down by state of matter or block using the dropdowns.
Spot a category
Tap any chip in the legend — alkali metal, noble gas, halogen and so on — to highlight every element in that family across the whole table at once.
Click an element
Selecting a tile opens its full detail card: atomic mass, electron configuration, electron shells, electronegativity, phase at room temperature and discovery year.
Step through neighbors
Use Previous and Next on the detail card to move through elements in atomic-number order without returning to the grid each time.
What the rows and columns mean.
Three ideas explain almost everything about how the table is laid out.
Groups (columns)
Elements in the same group share the same number of outer-shell electrons, which is why they tend to react in similar ways — group 1 metals are all soft and highly reactive, group 18 gases are all inert.
Periods (rows)
Each new period starts a new electron shell. Moving left to right across a period, atomic number rises by one each time and properties shift gradually from metallic to nonmetallic.
Blocks
Block tells you which type of orbital holds the outermost electron — s and p blocks form the main table body, d-block elements are the transition metals, and f-block elements are the lanthanides and actinides shown below.
Questions people actually ask.
The short answers — with the long ones one tap away.
How many elements are on the periodic table?+
There are 118 confirmed elements, from hydrogen (atomic number 1) to oganesson (atomic number 118). This tool includes all of them, including the synthetic superheavy elements added most recently.
How is the periodic table organized?+
Elements are arranged left to right by increasing atomic number, in rows called periods and columns called groups. Elements in the same group generally share similar chemical behavior because they have the same number of outer-shell electrons.
What does an element's category mean, like alkali metal or noble gas?+
Category groups elements by shared chemical behavior. Alkali metals are highly reactive soft metals, noble gases are largely unreactive, halogens are reactive nonmetals, and so on. Use the legend on this tool to highlight any category across the whole table at once.
What is atomic mass and why isn't it a whole number?+
Atomic mass is the weighted average mass of an element's naturally occurring isotopes, measured in atomic mass units (u). Because most elements have multiple isotopes with different masses and abundances, the average rarely lands on a whole number.
What is electronegativity?+
Electronegativity measures how strongly an atom attracts shared electrons in a chemical bond, on the Pauling scale. Fluorine has the highest electronegativity of any element. Noble gases and a few synthetic elements have no established value since they rarely form bonds.
How do I find an element's electron configuration?+
Search or click any element in this tool and its detail card shows the full electron configuration in noble-gas shorthand, along with the per-shell electron distribution.
Is this tool free, and where does my data go?+
It's completely free and runs entirely in your browser — nothing you search or click is uploaded, logged, or sent to any server. No account, no sign-up, no limits.