How accurate is the data?

All atomic weights follow the IUPAC 2021 Standard Atomic Weights report — the official reference used by chemistry journals and curricula worldwide. Electron configurations are taken from the NIST Atomic Spectra Database (the same source used by IUPAC). Melting points, boiling points, and densities come from the CRC Handbook of Chemistry and Physics and the NIST WebBook. Discovery years and discoverers cross-reference the Royal Society of Chemistry's element profiles. We deliberately do NOT generate any chemistry data with a language model — for student-facing tools, plausible-sounding-but-wrong numbers are worse than no data at all.

Why are some properties missing for elements heavier than 100?

That's real physics, not a gap in our dataset. Elements 101-118 have only ever been synthesized in single-atom or few-atom quantities, with half-lives measured in seconds or milliseconds. You cannot measure a "melting point" of a substance that exists for 0.7 milliseconds and consists of three atoms — so the bulk thermodynamic properties (melting/boiling/density) genuinely do not exist for those elements yet. We mark them as "not measured" rather than fabricate values.

What's the difference between groups and periods?

A period is a horizontal row (1-7) — going across, the atoms gain one proton at a time. A group is a vertical column (1-18) — elements in the same group share the same outer-shell electron count, which is why they react similarly. Group 1 (Li, Na, K, Rb, Cs, Fr) are all soft, silvery metals that explode in water. Group 18 (He, Ne, Ar, Kr, Xe, Rn) are all colorless, almost-unreactive gases. This is exactly the predictive pattern Mendeleev built the table around in 1869.

Yes — Ctrl/Cmd+P will print the table in the browser's print view. The 18-column grid is built with CSS Grid so it scales to letter and A4 cleanly. For a wallpaper-style high-resolution image suitable for a classroom wall, screenshot the page in landscape at 200% zoom — the SVG-free CSS layout stays sharp at any size.

Why are the lanthanides and actinides shown separately at the bottom?

The 14 lanthanides (57-71) and 14 actinides (89-103) all belong in group 3 of periods 6 and 7 — but inserting them inline would make the table 32 columns wide and nearly impossible to print on a standard page. Every reference periodic table from IUPAC, every textbook, and every classroom wall chart uses the same compromise — park the f-block below the main grid and mark its insertion point with a "57-71" / "89-103" placeholder. We follow the IUPAC convention exactly.

Why does Hydrogen sit in group 1 but isn't an alkali metal?

Hydrogen has one valence electron just like the alkali metals (Li, Na, K…) so it sits in column 1. But chemically it is a gas at room temperature, forms a diatomic molecule (H₂), and is firmly a nonmetal — the alkali metals are all solid metals that lose that electron easily. Some tables put H in group 17 too (it can gain an electron to form H⁻), which is why hydrogen is the most "where do I put it?" element on the chart. We color it as a nonmetal but keep it in group 1 to match the IUPAC standard layout.

Checking your homework electron configurations before submitting

You wrote [Ar] 3d6 4s2 for iron and want to confirm before turning in the worksheet. Click Fe (Z=26), and the detail panel shows the exact NIST ground-state notation next to it. Same for the tricky ones like copper ([Ar] 3d10 4s1, not 3d9 4s2) and chromium, where the half-filled d-shell breaks the naive aufbau order most textbooks warn you about.

Building a quiz on group trends for a 9th-grade class

You need 10 questions on alkali-metal reactivity. Type "1" in the search box to highlight the whole of group 1 (Li, Na, K, Rb, Cs, Fr) while every other tile dims, screenshot it, and drop it into the slide. Then search "18" for the noble gases. The dim-and-highlight makes the column pattern obvious without you redrawing anything.

Looking up a melting point mid-lab without opening the CRC Handbook

Your titration prep calls for tungsten's melting point. Click W (Z=74) and read 3422 degrees C straight from the CRC-sourced value, no flipping through a 2600-page reference. Because the synthetic elements past 100 are marked "not measured" rather than faked, you never copy a made-up number into a lab report.

Helping a Chinese-curriculum student match symbols to names

A student knows 铁 but blanks on the symbol. Type 铁 and Fe lights up; type "Fe" and 铁 appears in the tile. The bilingual name on every element bridges the gap that bites students moving between an English textbook and a 中文 exam, where 钨 / W or 锑 / Sb trip people up constantly.

Interactive Periodic Table — 118 Elements with Properties, Electron Config & Search

Interactive periodic table — 118 elements, properties, electron config, search.

Runs locally
Category Calculator
Best for Getting a realistic range before a purchase, plan, workout, or schedule decision.

118 elements

57-71

89-103

Lanthanides (57-71)

Actinides (89-103)

Legend

Alkali metalAlkaline-earth metalTransition metalPost-transition metalMetalloidNonmetalHalogenNoble gasLanthanideActinideUnknown / synthetic

What this tool does

Free interactive periodic table covering all 118 IUPAC-recognized chemical elements, from Hydrogen (Z=1) to Oganesson (Z=118). The classic 18-column × 7-row layout is rendered exactly the way it appears in the IUPAC reference chart, with the lanthanide (57-71) and actinide (89-103) f-block series displayed in a separate row below the main table — the same convention used in every chemistry textbook from middle school through graduate-level inorganic chemistry. Each tile shows the atomic number, element symbol, IUPAC name (English + 中文), and standard atomic weight. Click any element and a detail panel opens with the period and group, the full ground-state electron configuration (e.g. [Ar] 3d6 4s2 for iron), melting point and boiling point in °C, density in g/cm³, and the year and team of first isolation or synthesis. Elements are color-coded by category (alkali metal, alkaline-earth, transition metal, post-transition metal, metalloid, nonmetal, halogen, noble gas, lanthanide, actinide, and synthetic). The search bar accepts the symbol (type "Fe" → iron), the English or Chinese name (iron / 铁), or the atomic number (26) — matching elements stay vivid while the rest dim, so you can spot patterns at a glance. Every property value is taken from public IUPAC, NIST, and CRC Handbook references — never from a language model — because the failure mode of fake chemistry data is misleading exactly the students this tool is built for. 100% client-side, no signup, no tracking, no API calls. Works offline once loaded.

Tool details

Input: Text + Numbers; The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
Output: Live result + Preview; The result area focuses on usable output, with copy, download, or preview actions when supported.
Privacy: Browser-side processing; The main tool logic does not call an external API, so inputs normally stay in the current tab.
Save / share: No account required; Open the page and use it; whether results survive refresh depends on the tool.
Performance budget: Initial JS <= 40 KB; No WASM budget is declared, keeping the tool quick to open on mobile.
Best fit: Calculator · Student; Category and role tags drive related tools, internal links, and quick fit checks.

How to use

1. Input

Paste or drop your content into the tool panel.
2. Process

Click the button. All processing is local in your browser.
3. Copy / Download

Copy the result or download to disk in one click.

How Periodic Table fits into your work

Use it for fast estimates, comparisons, and planning numbers before you make the final call.

Calculation jobs

Getting a realistic range before a purchase, plan, workout, or schedule decision.
Comparing scenarios by changing one input at a time.
Turning rough assumptions into a number you can discuss.

Calculation checks

Double-check units, dates, rates, and rounding assumptions.
Treat health, finance, tax, and legal outputs as planning aids, not professional advice.
Save the inputs that produced an important result so you can reproduce it later.

Good next steps

These links move the current task into a more complete workflow.

Real-world use cases

Checking your homework electron configurations before submitting
You wrote [Ar] 3d6 4s2 for iron and want to confirm before turning in the worksheet. Click Fe (Z=26), and the detail panel shows the exact NIST ground-state notation next to it. Same for the tricky ones like copper ([Ar] 3d10 4s1, not 3d9 4s2) and chromium, where the half-filled d-shell breaks the naive aufbau order most textbooks warn you about.
Building a quiz on group trends for a 9th-grade class
You need 10 questions on alkali-metal reactivity. Type "1" in the search box to highlight the whole of group 1 (Li, Na, K, Rb, Cs, Fr) while every other tile dims, screenshot it, and drop it into the slide. Then search "18" for the noble gases. The dim-and-highlight makes the column pattern obvious without you redrawing anything.
Looking up a melting point mid-lab without opening the CRC Handbook
Your titration prep calls for tungsten's melting point. Click W (Z=74) and read 3422 degrees C straight from the CRC-sourced value, no flipping through a 2600-page reference. Because the synthetic elements past 100 are marked "not measured" rather than faked, you never copy a made-up number into a lab report.
Helping a Chinese-curriculum student match symbols to names
A student knows 铁 but blanks on the symbol. Type 铁 and Fe lights up; type "Fe" and 铁 appears in the tile. The bilingual name on every element bridges the gap that bites students moving between an English textbook and a 中文 exam, where 钨 / W or 锑 / Sb trip people up constantly.

Common pitfalls

Trusting an AI chatbot for "the melting point of element 115" — those numbers are hallucinated. Moscovium has never had its melting point measured; this table marks it "not measured" instead of inventing one.
Writing chromium as [Ar] 3d4 4s2 by blindly following aufbau order. It is actually [Ar] 3d5 4s1 (half-filled d-shell is more stable); click Cr to see the real config.
Assuming hydrogen is an alkali metal because it sits in group 1. It is a nonmetal gas (H2); the tile is colored as a nonmetal even though the column is 1.

Privacy

This periodic table is fully client-side. The element data ships with the page, so clicking tiles and reading properties makes zero network calls and works offline once loaded. Your search queries stay in the browser and are never sent anywhere or written into the URL, so nothing you type or look up is logged, tracked, or shareable by accident.

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Interactive Periodic Table — 118 Elements with Properties, Electron Config & Search

What this tool does

Tool details

How to use

1. Input

2. Process

3. Copy / Download

How Periodic Table fits into your work

Calculation jobs

Calculation checks

Good next steps

Real-world use cases

Checking your homework electron configurations before submitting

Building a quiz on group trends for a 9th-grade class

Looking up a melting point mid-lab without opening the CRC Handbook

Helping a Chinese-curriculum student match symbols to names

Common pitfalls

Privacy

FAQ

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