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Chemistry Tools · Updated October 21, 2026 · Reviewed by FormatFlow Editorial

Periodic Table Explorer

You can explore an interactive periodic table of all 118 elements in your browser: search by name, symbol or atomic number, filter by category, and open a detail panel with masses, configurations and oxidation states.

Runs in your browserFree · No sign-up · No watermark
ELEMENTS → DATARuns in your browser
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Everything runs locally in this tab. No file is uploaded while the tool loads.

This tool runs in your tab. Nothing is uploaded and no copy is stored.

How files are handled

At a glance

Works with
ELEMENTS → DATA
Processing
In your browser
Price
Free, no account
Updated
October 21, 2026
All Chemistry Tools

About Periodic Table Explorer

The periodic table is the map of chemistry: elements are ordered by atomic number and arranged so that elements with similar behavior share a column. A single cell gives the symbol, name and atomic weight, while its position supplies the group, period and block that explain a great deal of the element's chemistry.

This explorer adds search, category filters and a detail panel to the familiar 18-column layout, with the lanthanide and actinide rows below. A complete data table underneath the grid exposes the same information for screen readers and copy-paste, and the whole page is built from a local dataset with no network requests.

What this tool does

The details that matter when you use Periodic Table Explorer for real work.

  • All 118 elements

    The dataset covers hydrogen to oganesson with symbol, name, atomic number, conventional atomic weight, category, group, period, block, configuration, oxidation states and state at 20 °C.

  • Search and category filters

    Type a name, symbol or atomic number to highlight matches, and use the chips to dim everything outside a family such as alkali metals, halogens or lanthanides.

  • Detail panel

    Select any element to read its electron configuration, common oxidation states, physical state and group, period and block in one place.

  • Plain data table

    A full 118-row table repeats the dataset as ordinary text for screen readers, keyboard users and anyone who wants to copy values.

  • Honest data notes

    Atomic weights follow IUPAC/CIAAW values, and the panel flags that properties for elements from rutherfordium onward are predicted rather than measured.

  • Local and instant

    The table is rendered from a bundled dataset, so it works offline after loading and never sends your search anywhere.

How to use Periodic Table Explorer

No account, no installation — the whole job happens in this browser tab.
  1. 01

    Search for an element

    Type part of a name or symbol, or an atomic number, into the search box to highlight matching cells and count the matches.

  2. 02

    Filter a family

    Use the category chips to dim elements outside that family; click the active chip again to show the whole table.

  3. 03

    Select an element

    Click or focus a cell to load its detail panel below the grid; each cell is a labelled button for keyboard and screen-reader use.

  4. 04

    Read the position

    Group is the column, period is the row and block is the orbital type being filled; the detail panel spells all three out.

  5. 05

    Open the data table

    Expand the element data table for a plain-text list of every property, including configurations and oxidation states.

How this tool works

Works with
ELEMENTS → DATA
Processing
Client-side, in your browser. Nothing is uploaded.
Requirements
Chrome, Edge, Firefox or Safari · JavaScript enabled

Limitations worth knowing

  • Atomic weights are conventional standard values; unstable elements use a representative mass number, so weight-based calculations are approximate.
  • Electron configurations are noble-gas shorthand ground states; excited states and full configurations are not shown.
  • Common oxidation states are a summary of the most familiar values, not an exhaustive list, and properties for elements from Z = 104 onward are predicted.
  • No isotope-specific masses or radioactive-decay data are included.

Privacy and file handling

The table is rendered from a dataset bundled with the page, and searches stay in your browser. Nothing you type is uploaded, stored or logged, and the tool makes no network request.

Read the full privacy policy

Periodic Table Explorer FAQ

Short, direct answers to the questions people ask before using this tool.
How is the periodic table ordered?
Elements are ordered by increasing atomic number, read left to right and top to bottom. Each row is a period, each column is a group, and the f-block is shown as two separate rows below the main grid so the table keeps its 18-column shape.
What do group, period and block mean?
A group is a column of elements with related valence behavior, a period is a row that corresponds to the highest principal energy level in use, and a block names the subshell being filled: s, p, d or f. Together they place every element in the table.
Why are lanthanides and actinides placed below the table?
The f-block contains 15 elements per row, which would make the main grid far too wide. Standard layouts therefore show a 57–71 and an 89–103 placeholder in group 3 and put the two f-block rows underneath; the detail panel still records each element's period.
Where do the atomic weights in this table come from?
They are the IUPAC/CIAAW abridged standard atomic weights. Elements with no stable isotope use the conventional mass number of their longest-lived isotope, which is the value normally printed in periodic tables, so those weights are approximate.
Why do some elements show predicted values?
Elements from rutherfordium (Z = 104) onward have no bulk sample and very short half-lives, so their electron configurations, oxidation states and physical states come from calculation and extrapolation rather than measurement. The detail panel marks these elements as predicted.
What are oxidation states?
An oxidation state is the charge an atom would carry if its bonds were fully ionic, which makes it a useful bookkeeping number for formulas and redox chemistry. The table lists the most familiar values for each element; the list is a summary, not every state that has ever been prepared.
What does the state at 20 °C refer to?
It is the physical state of the element at 20 °C and standard pressure. Eleven elements are gases at that temperature, bromine and mercury are liquids, and the rest are solids; the predicted flag marks superheavy elements whose state has not been observed.
Is the periodic table accessible with a keyboard and screen reader?
Every cell is a native button with an accessible name that includes the element name, symbol and atomic number, so it can be reached with Tab and activated with Enter or Space. A complete data table is also available in plain HTML for readers that work better with linear content.

Background reading

Format guides that explain the trade-offs behind Periodic Table Explorer.