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Aug 15, 2026

Fixed the element details on the home page overflowing onto a second line in some languages - long labels now shorten with the full text on hover

Fixed the Temperature and Color selectors in Settings showing their check marks misaligned on Safari

New 'Wide' option under Table Width in Settings - shows the full 32-column table with the lanthanides and actinides inline in their proper place

New 'A/B Group Labels' toggle in Settings - switch the column headers between the modern 1-18 numbering and the traditional A/B labels (IA, IIA ... VIIIA)

New Pro page with all membership benefits and a clearer 'Go Pro' button across the site, now that Pro includes the Quiz and calculators (not just ad-free)

Fixed the home page showing a stray extra vertical scrollbar even when there was nothing to scroll

Fixed the Settings panel layout on mobile, where the options and their labels were splitting into two misaligned columns

Aug 2, 2026

New Element Quiz - practice symbols, names and atomic numbers (a Pro feature)

Fixed the footer floating in the middle of the screen on short pages - it now sits at the bottom

Removed the Buy Me a Coffee link from the header and footer to tidy up the interface

New Molar Mass Calculator under Tools - type a formula like Ca(OH)2 to get its molecular weight

New Percent Composition calculator under Tools - see each element's percent by mass

New Empirical Formula calculator under Tools - find the simplest formula from composition (a Pro feature)

New Equation Balancer under Tools - balances chemical equations for you (a Pro feature)

New Dilution Calculator under Tools - solve C₁V₁ = C₂V₂ for any missing value

New Molarity Calculator under Tools - type a formula, then solve mass, volume or molarity

New Ideal Gas Law Calculator under Tools - solve PV = nRT for any missing value

New Percent Yield Calculator under Tools - solve actual, theoretical or percent yield

New Half-Life Calculator under Tools - radioactive decay N = N₀·(½)^(t/t½), solve any value (a Pro feature)

New pH Calculator under Tools - enter pH, pOH, [H⁺] or [OH⁻] to get the rest

New Polyatomic Ions chart under Tables - common ions with their formulas and charges

New Common Acids & Bases chart under Tables - formulas and strong/weak classification

New Flame Test Colours chart under Tables - the characteristic flame colour of each metal

Element pages now show the flame test colour for elements that have a characteristic one (e.g. sodium, copper, calcium)

New Property Rankings page under Tables - rank the elements by electronegativity, density, melting point, atomic radius, ionization energy and more

Element pages now list each element's Electron Affinity and its successive Ionization Energies

Element pages now show the element's visible emission spectrum (its characteristic coloured lines)

On an element's page, you can now go to the previous or next element with the arrow keys, a swipe, or a sideways scroll

Fixed the Settings panel selection on Safari, and parts of Settings being cut off on mobile

Fixed ion charges in the solubility chart showing as subscripts instead of superscripts (e.g. Mg²⁺)

Corrected Thorium-232, which was incorrectly listed as a stable isotope

Jul 6, 2026

You can now remove ads for $1/month - subscribe and log in with Gumroad under Settings

Added a Brazilian Portuguese version of the site at pt-br.periodic-table.io

The element preview on hover now shows the crystal structure diagram in the top corner

You can now choose which 6 properties show in the hover details panel, from Settings

Added Phase (solid/liquid/gas) as a hover detail, shown by default

Jun 30, 2026

Added an s/p/d/f block selector at the top of the table - hover a block to highlight its elements

The site now follows your device's light or dark mode automatically, until you choose a theme yourself

Fixed the periodic table appearing mirrored in right-to-left languages (Arabic, Persian, Hebrew)

Fixed the missing site icon (favicon) for Esperanto, Tamil and Uzbek

Jun 17, 2026

Updated the design of the site to be more modern, introduced animations and a new font

Added a search bar to search for elements based on name or number

May 14, 2026

Updated Japanese, Czech, Turkish, Greek, Polish, Hindi, Thai, Vietnamese and Indonesian translations

Oct 12, 2025

Updated Czech, Portuguese, Croatian, Greek and Indonesian translations

Jan 28, 2025

Updated Armenian, Romanian, Bulgarian, Czech, Finnish and Tamil translations

Added notification panel to show the latest updates

Jan 19, 2025

Updated Vietnamese, Persian, Dutch, Romanian, Arabic, Greek, Hungarian, Indonesian, Japanese and Portuguese translations

Jan 17, 2025

Updated German, Thai, Ukrainian, Russian, French and Croatian translations

May 2023

Updated Afrikaans, Norwegian Bokmål, Norwegian Nynorsk, Slovenian and Portuguese translations

Apr 2023

Updated Afrikaans, Bulgarian, Catalan, Czech, Danish, Dutch, Finnish, German, Hebrew, Japanese, Korean, Malay, Serbian, Solvenian, Swedish, Thai and Vietnamese translations

Mar 2023

Added Buy Me a Coffee link at the header and footer

Updated Czech, Esperanto, Greek, French, Vietnamese, Chinese Traditional, Indonesian, Romanian and Swedish translations

Sep 2022

Added Esperanto and Uzbek translations

Updated Danish, Czech, Greek, French, Hindi, Polish, Macedonian, Ukranian, Chinese Traditional, Indonesian and Swedish translations

Sep 2021

Updated Korean, Turkish, Portuguese and French translations

Aug 2021

Updated French, Spanish, Croatian, Hindi and Chinese (Traditional) translations

Jun 2021

Added a new printable - Flash Cards in Printables page

Added Tamil translation

Updated French translation

Updated the Translation page to use links instead of images

May 2021

Added a new printable - Flash Cards in Printables page

Included Tamil and Telugu for anyone to translate as per Suggestions by users

Updated external links to be opened in new tab

Updated Armenian, Hebrew and Chinese (Simplified) translations

Apr 2021

Updated Spanish, Portuguese, French, Hungarian, Persian, Russian, Slovak and Polish translations

Fixed the broken links in the Store page

Minor corrections to the solubility table

Mar 2021

Added Solubility Chart and Reactivity Series under Tables menu

Added social images to all pages to show up when the pages are shared on social media

Fixed the incorrect font sizes in the navigation bar

Updated Italian, Dutch, German, Portuguese, Polish, Croatian, Russian, Armenian, Japanese and Chinese (Simplified) translations

Feb 2021

Complete rewrite of the website to deploy the code faster; Individual language versions have their own subdomains

Added Afrikaans translation

Updated Norwegian Bokmal, Spanish, Vietnamese, Chinese(Simplified), Chinese(Traditional), Japanese, German, Portuguese, French and Italian translations

Nov 2020

Added Crystal Structure image to the element page

Added Macedonian translation

Updated Armenian, Greek, Spanish, Italian, Portuguese, Slovenian, Thai, Vietnamese and Chinese(Simplified) translations

Oct 2020

Added Armenian and Malay translations

Added a new printable - Flash Cards in Printables page

Updated Croatian, Greek, Hebrew, Hindi, Norwegian Bokmal, Polish, Romanian, Vietnamese and Dutch translations

Fixed the top navbar so that the navbar does not overlap the scrollbar

Aug 2020

Updated the icons in the navbar to outline icons

Simplified localisation and individual languages will now be included in the url

Added a new printable in Printables page

Added CAS Number and PubChem CID Number

Fixed electron configuration rendering issues in Edge and Chrome

Updated Arabic, Persian, Hindi, Italian, Indonesian, Vietnamese, German, Greek, Polish, Dutch, Slovak, Chinese (Simplified) and Chinese (Traditional) translations

Jul 2020

Added a new printable in Printables page

Added a new page - Translation where you can check the status of each language and contribute translations

Added mass number, number of protons, electrons and neutrons

The line height for the Elements page is increased and the text is easily readable

Updated Polish, Croatian, Chinese Simplified, Croatian and Korean translation

Added an option in Settings to change the style of the periodic table from 3 options

Replaced the dropdown for temperature in Settings with a radio select

Updated the navbar header from a gradient to solid color which now matches with the window color when opened as PWA

Jun 2020

Modified the style of the element page to use more shadows and less color

Modified the colors of the Settings popup for both light and dark themes

Added Instagram page link to the footer

Added a new printable in Printables page

Added Suggestions where new suggestions or feature requests can be provided

Fonts for Thai and Hebrew are updated

Reduced extra spacing on top and bottom sides of the electronic configuration

Updated Chinese Simplified, Croatian, Portuguese and Danish translations

May 2020

Updated Polish, Russian, Vietnamese, Slovenian, Chinese Simplified translations

Added a new page - Printables which provides a printable version of the periodic table which will be updated regularly

Added a new page - Credits for translations which was earlier appearing in About page

Added icons to the navigation bar at the top

Added footer component on all pages which includes quick links not available in the top navigation bar

Updated link colors to match the theme color

Reduced the number of colors in Settings from 25 to 10 which matches with the periodic table colors

Fixed the layout bug where the 2nd and 3rd row were appearing with a huge space on iOS devices

Fixed scrollbar styles for all browsers

Added an open-source license on Github

Removed theme switching to enable light or dark mode from Settings and a dedicated button is available in the top navigation bar

Replaced the existing static image of electronic configuration with an animated version

Please contact me at [email protected] if you have any suggestions or issues with the website

Feb 2020

Modified colors at the navigation bar for better accessibility

Updated Persian, Croatian, Hungarian, Polish, Greek, Hebrew, Portuguese, German, Spanish, Chinese (Traditional), Russian, Thai, French, Italian, Chinese (Simplified) and Turkish translations

May 2019

Added Store page for t-shirts and other merchandise

Added English (UK) translation

Updated Chinese (Simplified), Portuguese, Spanish, Indonesian, Vietnamese and Chinese (Traditional) translations

Apr 2019

Updated Arabic, Italian and Croatian translations

Dec 2018

Added Slovenian, Norwegian (Nynorsk) and Croatian translations

Updated Danish, Japanese and Italian translations

Nov 2018

Added Danish, Greek, Thai and Hebrew translations

Updated Arabic, Chinese (Traditional), Chinese (Simplified), Portuguese, Catalan, German and Japanese translations

Jun 2018

Updated Russian, French and Arabic translations

May 2018

Updated Persian, Czech, Italian, Dutch, Catalan, Vietnamese, Hungarian, Indonesian and Japanese translations

Apr 2018

Updated Dutch and Korean translations

Mar 2018

Released the first version of the website with Progressive Web App (PWA) features

Updated the colors of the periodic table

Added options for wide and large tiles when website is pinned to Start on Windows 10

Added Hindi, Chinese (Traditional), Arabic, Polish and Swedish translations

Updated Japanese and Dutch translations

Notes de la versió

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