How many elements does this interactive periodic table alternative show?

It shows all 118 confirmed elements, from hydrogen (H, atomic number 1) to oganesson (Og, 118). Elements 1 through 94 occur naturally on Earth (some only in trace amounts), and elements 95 to 118 have only been produced synthetically in laboratories. The full set is rendered in one view.

Where do the atomic weights come from?

The standard atomic weights are the IUPAC 2021 abridged values from the Commission on Isotopic Abundances and Atomic Weights (CIAAW). Elements with a stable, natural isotopic composition — such as carbon (12.011) or iron (55.845) — show their conventional standard atomic weight, which can be used directly in calculations.

What does a value in square brackets, like [294], mean?

A bracketed value is the mass number of the element's longest-lived isotope, not a measured atomic weight. Radioactive elements such as technetium, promethium, polonium, and every element from atomic number 84 upward have no standard atomic weight because they lack a stable isotope with a fixed natural abundance. IUPAC lists the mass number of the most stable isotope instead.

What do the colours on the table mean?

Each colour marks an element category: alkali metals, alkaline earth metals, transition metals, post-transition metals, metalloids, reactive nonmetals, halogens, noble gases, lanthanides, and actinides. Grouping by colour makes periodic trends easy to see, and clicking any category in the legend highlights just those elements while dimming the rest.

Why are the lanthanides and actinides shown as separate rows?

The lanthanides (elements 57–71) and actinides (89–103) are f-block elements that chemically belong in group 3 of periods 6 and 7. Placing them inline would make the table 32 columns wide, so by long-standing convention they are pulled out into two rows beneath the main table, with placeholders marking where they belong. This tool follows that standard layout.

Does the tool require a sign-in or any installation?

No. Nothing is installed and no account is needed — the whole table runs locally in your browser. Once the page loads, you can browse, click, search, and filter without sending data anywhere.

Interactive Periodic Table Alternative: All 118 Elements

The fastest way to replace a clunky or paywalled chemistry reference is an in-browser interactive periodic table alternative that covers all 118 elements, from hydrogen (H, atomic number 1) to oganesson (Og, 118), without requiring an account, payment, or installation. The Interactive Periodic Table on this page does exactly that: it lays out every confirmed element in the standard 18-column, 7-period grid chemists recognise, with the lanthanide and actinide series drawn as two separate rows beneath the main body. Each cell shows the atomic number, element symbol, element name, and standard atomic weight, and every element is colour-coded by its chemical family. Tapping or clicking any element opens a detail panel listing its atomic number, symbol, standard atomic weight, category, period, group, and electron block (s, p, d, or f). The standard atomic weights follow the IUPAC 2021 abridged values published by the Commission on Isotopic Abundances and Atomic Weights (CIAAW), so the figures match what appears in textbooks and exam papers. For radioactive elements with no stable isotope, the table shows a bracketed mass number of the longest-lived isotope — the same convention used on the official IUPAC chart.

What separates a useful interactive periodic table alternative from a static chart

A few practical criteria separate a useful replacement from a glorified image. The first is coverage: any tool worth switching to must show every element currently recognised by IUPAC, which means all 118, including the superheavy synthetics that push past uranium. The second is source accuracy — atomic weights should come from the CIAAW's published abridged values rather than from a scraped database that drifts out of date. The third is interaction: clicking an element should reveal the period, group, electron block, and category, not just a static box. The fourth is filtering: a legend that lets you highlight one family at a time, plus a search box that accepts names, symbols, and atomic numbers, turns a passive chart into a working reference. The fifth is friction — no accounts, no app stores, no paywalls blocking basic data.

The Interactive Periodic Table on this page clears all five: 118 elements, IUPAC 2021 abridged weights, a detail panel with seven fields per element, a clickable legend, and a fully browser-based build that runs locally with nothing to install.

What each element shows: layout, cell data, and the detail panel

The table renders in the standard 18-column, 7-period layout with the lanthanide series (elements 57–71) and actinide series (89–103) drawn as two separate rows beneath the main body — the arrangement every chemistry textbook uses. Placeholder cells in the main grid mark the spots the f-block elements would occupy if they were drawn inline, which would otherwise force a 32-column table. Every cell carries four pieces of data: the atomic number in the top-left, the element symbol in large type, the element name beneath it, and the standard atomic weight at the bottom. Ten distinct colours group the elements into chemical families so the shape of the table reads at a glance.

Tapping or clicking any element opens a detail panel with the same core data plus the element's category, its period (row), its group (column), and the electron block it belongs to (s, p, d, or f). The electron block label is the most useful extra piece of information for anyone trying to read the table structurally, because it tells you which subshell is filling in that row of the table — and therefore how many valence electrons a main-group element carries.

How to browse, click, and search the table

The interface has three main actions: browse, click, and search. Once the table is loaded in your browser, all three work together as a quick lookup workflow.

Browse the full 118-element grid — each cell shows the atomic number, symbol, name, and standard atomic weight, colour-coded by element category. The lanthanide and actinide series appear as two separate rows below the main body.
Click or tap any element to open a detail panel listing its atomic number, symbol, standard atomic weight, category, period, group, and electron block. Use this to confirm valence-electron counts, period trends, or a specific atomic weight for a calculation.
Type a name, symbol, or atomic number in the search box — for example "iron", "Fe", or "26" — and the matching elements stay highlighted while the rest of the table fades. Click a category in the legend to filter the same way by chemical family.

How to read atomic weights correctly, including bracketed values

Atomic weights are not all measured the same way, and the table is honest about that. Elements with a stable, natural isotopic composition — carbon (12.011), iron (55.845), gold (196.97), thorium (232.04), and uranium (238.03) — show a conventional standard atomic weight derived from the IUPAC 2021 abridged values. These are weighted averages of natural isotopic abundances and can be used directly in stoichiometry.

Radioactive elements with no stable isotope — technetium, promethium, and everything from polonium (84) upward, including all the superheavy synthetic elements — have no measured standard atomic weight. For these, the table shows the mass number of the element's longest-lived isotope in square brackets, for example Tc [97] or Og [294]. The brackets signal that the figure is a mass number of the most stable isotope rather than a measured atomic weight, matching the convention used on the official IUPAC periodic table.

For a worked example, take a stoichiometry question asking for the mass of 2.5 moles of iron. The table reads Fe with a standard atomic weight of 55.845. Multiply: mass = moles × atomic weight = 2.5 × 55.845 = 139.6125 g. Because 55.845 is the conventional IUPAC abridged value, the answer is good for any textbook or exam problem. The same substitution would not work for technetium, where the bracketed [97] is a mass number rather than a measured atomic weight — you would need the specific isotope's actual mass and a stated half-life to do a meaningful calculation.

The 10 colour categories and how to filter by family

Each colour on the table marks a chemical family, and the legend doubles as a filter. Click any category in the legend to highlight just those elements and dim the rest; click it again to clear. This is the fastest way to isolate, say, the halogens or the lanthanides without scrolling row by row. The ten families shown are summarised below.

Category	Where it sits	Example elements
Alkali metals	Group 1, except hydrogen	Lithium (Li), sodium (Na), potassium (K)
Alkaline earth metals	Group 2	Magnesium (Mg), calcium (Ca), barium (Ba)
Transition metals	Groups 3–12	Iron (Fe), copper (Cu), gold (Au)
Post-transition metals	Groups 13–15, lower periods	Aluminium (Al), tin (Sn), lead (Pb)
Metalloids	Diagonal band between metals and nonmetals	Boron (B), silicon (Si), germanium (Ge)
Reactive nonmetals	Groups 14–17, upper periods	Carbon (C), nitrogen (N), oxygen (O)
Halogens	Group 17	Fluorine (F), chlorine (Cl), iodine (I)
Noble gases	Group 18	Helium (He), neon (Ne), argon (Ar)
Lanthanides	Separate row, elements 57–71	Lanthanum (La), cerium (Ce), europium (Eu)
Actinides	Separate row, elements 89–103	Actinium (Ac), thorium (Th), uranium (U)

Tasks this alternative handles fastest

A few recurring tasks play to the strengths of a browser-based interactive periodic table alternative. Students memorising element symbols benefit from the search-and-highlight workflow: type a symbol, see exactly where it sits in the grid, and link position to properties. Doing molar-mass or stoichiometry work — see the worked example in the previous section — needs only the atomic weight from a single cell, with no flipping through appendices. Teachers demonstrating periodic trends can click a category in the legend to isolate one family and walk through period and group behaviour on a projected screen, then click again to clear. Researchers and engineers reading a materials spec or a paper can confirm a symbol, weight, or electron block without leaving the document they are studying. Anyone with a one-off calculation can search by name, symbol, or atomic number and read the value straight off the highlighted cell.

Because the layout mirrors the printed IUPAC chart, position carries meaning too: an element's column hints at its valence-electron count, its row tells you which electron shells are filling, and the colour marks its chemical family. Pair that structural reading with the search and category filters, and the Interactive Periodic Table becomes a single-screen reference for both quick lookup and trend-spotting — the kind of task a static image or a paper chart simply cannot handle.