periodictable.com — September 2026 traffic, keywords & AI visibility

periodictable.com draws an estimated 201,100 visits a month from search engines. Effectively all of it is organic — about 201,100 visits from unpaid results. Spread across 17,200 ranking keywords, that averages roughly 12 organic visits per keyword.

On our AI visibility scale periodictable.com earns 90 of 100 points, a grade A+. It takes full marks for LLMS.txt and Structured data. The biggest gap is Crawlability, at 5 of 10 points (robots ✓ · sitemap ✗), worth 5 points if closed. It also loses points on Company profile (22/25) and SEO health (18/20).

The llms.txt on periodictable.com runs to 81 lines (4,094 characters) across 12 sections, last generated in May 2026. It introduces the site as "PeriodicTable.com - Interactive Periodic Table of Elements". It tells AI engines the business works in Chemistry Education, Scientific Reference and Interactive Learning. It describes 5 products, with prices such as Interactive Periodic Table at Free, Element Photography Collection at Free and Chemistry Trivia & Quizzes at Free. Services it lists include Custom Element Research, Educational Integration, Periodic Table Licensing and Chemistry Consulting. The audience it names is Students, educators, scientists, STEM enthusiasts, aged 13+ (Global). Technologies it mentions include HTTPS, HTML5, CSS3, JavaScript and Interactive SVG. The keywords it claims start with "Periodic Table", "Chemical Elements", "Periodic Table of Elements" and "Chemistry Reference".

# PeriodicTable.com - Interactive Periodic Table of Elements

## About
PeriodicTable.com delivers an engaging interactive periodic table that's been a cornerstone for chemistry learning since the late 90s. Created by Theodore Gray, it features stunning photos of actual element samples alongside key properties like atomic number, density, and electron shells for all 118 elements. Students rely on it for homework help, teachers for classroom demos, and researchers for quick fact-checking. The site's strength lies in its visual storytelling—hover over an element and see real-world samples, not abstract icons. It covers everything from common metals like iron to rare gases like oganesson, with trivia and history sprinkled in to keep things lively. No paywalls or upsells; just pure, reliable science at your fingertips. Competitors offer similar tools, but few blend reference depth with aesthetic appeal like this one. It's mobile-friendly enough despite missing some modern meta tags, and HTTPS keeps data secure. Perfect for periodic table trivia nights or pre-lab prep. The connection to Wolfram Research adds credibility through precise calculations. Kids discover elements playfully, while pros appreciate the detail on isotopes and compounds. Regularly updated to reflect scientific consensus, it remains timeless in edtech. Beyond the table, it sparks curiosity about chemistry's role i

Google lists periodictable.com for about 17,200 keywords, which together bring an estimated 201,100 organic visits a month.

The latest technical audit of periodictable.com scored 79 out of 100 overall. Accessibility is its weakest area at 60, while performance scores highest at 100. The audit makes 12 recommendations in all, and 4 of the 4 listed first are rated high priority or critical.

PeriodicTable.com's company profile names ptable.com, chemistryworld.com, sciencenotes.org and chemistry.com as competitors. Its own llms.txt adds elementarychemistry.com and chemistryexplained.com. Outside its market, the domains ranked closest to it in our worldwide ranking are adirondackdailyenterprise.com, mignonmuse.com, whtvr.ai and jablickar.cz.

ptable.com

chemistryworld.com

sciencenotes.org

chemistry.com

elementarychemistry.com

chemistryexplained.com