Changelog

Added

• Preview images for shared links.

Added

• The Bohr model:
  • a 3D view;
  • coloring electrons by shell, subshell, or orbital, in both views;
  • a halo around the electrons an ion gains.
• Ionic radii in the Radii section: the radius of the ion picked in Oxidation States, or of the element's most common ion, with its charge and coordination number.
• Spin state and hybridization labels on covalent radii.
• Standard electrode potentials in the Electromagnetic Properties section.
• Pearson symbols and space groups for every crystalline form in the Crystal Structure section, on element pages, and the compare page.
• A copy button for electron configurations.
• A note on the 20 elements whose electron configuration breaks the Aufbau principle, showing the configuration the principle predicts.
• An "Open as full page" button in element and nuclide dialogs.

Changed

• Redesigned the Crystal Structure section and the physical constants page.
• The Oxidation States section:
  • highlights a common 0 state like the other common states;
  • colors its legend like the states;
  • moves between states with the arrow keys, Home, and End, and picks one with Enter or Space.
• The 2D Bohr model stops spinning when your device is set to reduce motion.

Fixed

• Closing an element or nuclide page returns to the page it was opened from instead of always going to the table or the nuclides table.
• The radius you picked stays selected when you move to another element.
• The calculated radius drawing reaches the calculated circle, and draws the empirical radius it's compared with in the empirical color.
• Screen readers announce missing radii as unavailable, and whether an oxidation state is common or rare.
• "Van der Waals" is spelled correctly.
• On mobile, the bottom of the table is no longer hidden behind the navigation bar.

Fixed

• Visitor statistics no longer count bots and automated browsers.

Added

• All ionization energies levels for every element.

Changed

• Updated data sources.

Fixed

• Phenolphthalein becomes colorless with pH above 13.
• Make crystal structures visualization be of black color in light mode.

Added

• Two new table forms:
  • Extra-long 32-column table, with the lanthanides and actinides inside periods 6 and 7;
  • Left-step Janet's table.
• A physical constants page with values, their uncertainties, and units.

Changed

• Oxidation States comes before Radii in the Atomic tab.

Added

• Electron configurations of ions on element pages. Pick any oxidation state in the Atomic tab's Oxidation States section (Fe, Fe²⁺, Fe³⁺…) to see:
  • its Bohr model and energy level diagram, with the electrons it lost or gained marked;
  • the order its electrons leave or arrive in (4s before 3d);
  • the energy it takes to form the ion, and the atoms and ions with as many electrons.
• Menu search opens an element's ion: type "Fe3+" or "iron 1-".
• The solubility table highlights the row and column of the cell you point at.

Fixed

• Radii labels on Ukrainian element pages no longer appear in English.

Added

• An elements discovery timeline view in the table.
• An "Oxidation States" view in the table.
• A scatter plot on the trends page. Plot any property against another (e.g., density against boiling point).
• The oxidation states and valence electrons counts for the heatmap, element list, and trends page.

Changed

• Moved sources out of Terms of Service.

Fixed

• Chart tooltips no longer slide in from the corner of the chart.
• Axis numbers in the thousands on the trends page are written in full (1,750 instead of 1.75e3).
• Corrected Roentgenium valence electrons number.

Changed

• The "Universe" abundance is now "Solar System".
• Adjusted elements data.

Fixed

• Very small values no longer show as zero.
• Temperatures in °F no longer turn into scientific notation in the heatmap.

Added

• Select between latinized (Гідроген) and native (Водень) names for the elements.
• Element pages show the other name next to the title.
• The element list and compare search find elements by their native names too.

Added

• A pressure slider in the table's phases view and in every element's phase section.
• A supercritical phase, shown above an element's critical point.
• Triple points and critical points for elements that have them in the phase section.
• A "Beneficial" biological role for elements likely useful to the body but not proven essential.
• Plants and microbes in the table's biological roles view.
• Up and down buttons next to the previous and next element buttons, to move within an element's group.
• Replaced "Primordial" with where each natural element was made (e.g., Big Bang, merging neutron stars, etc.) with each source's share.
• Replaced "Native" with the Goldschmidt geochemical class (lithophile, siderophile, chalcophile, atmophile), with its own table view.
• An "Observationally stable" status for nuclides that could decay but never have been seen to, with its own color in the nuclides table and a half-life lower bound where one is known.
• Allotropes in each element's crystal structure section (e.g., graphite, diamond, graphene), each with its lattice, or a model for amorphous, molecular, 2D sheet, 1D chain, and nanotube forms, and its density.
• An allotrope count for the heatmap, element list, and trends page.

Changed

• "Toxic" now marks chemical poisons only. Radiotoxic elements rely just on their radioactive mark.

Fixed

• Print preview fills the screen width on mobile.
• Menu search lists every element matching a partial name, not just one.
• Slider marker labels are placed so they no longer overlap.
• Technetium, Promethium, Neptunium, and Plutonium are now "From decay" rather than synthetic, since traces of them occur in nature.
• Carbon, Germanium, Phosphorus, and Cerium show the crystal structure of their standard form, and Boron's density is now that of the solid rather than the liquid.

Fixed

• The installed app icon now fills the home screen tile. Copies installed before this release keep the old icon until they are reinstalled.
• Disabled autocomplete in search field.
• Updated tinted cells text colors.
• Table correctly auto-fits on large screens.
• Don't cover menu with toasts.

Added

• Setting commands in the menu search: type "dark theme", "Fahrenheit", or "Ukrainian" to change a setting without opening Settings.
• Element shortcuts in the menu search:
  • An element's name, symbol, or atomic number opens its page.
  • Adding a section or property, as in "iron boiling point" or "Au radii", opens the right tab, then scrolls to and highlights it.
  • Adding a mass number, as in "iron 56", opens that isotope.

Changed

• The menu search understands natural wording and tolerates typos, so "table of nuclides" and "nucleodic table" both find the nuclides table.

Added

• Spectral analysis in the menu search, opening the element list with emission spectra shown.

Changed

• Each tab of an element page now has its own title and a description quoting its key values.
• More detailed page descriptions for search results and link previews.

Fixed

• Pages no longer flash without the menu, panels, or parts of the table while loading in Chromium-based browsers.

Added

• A solubility table charting 23 cations against 15 anions, with the formula, name, and solubility of every compound.
• A solubility table sheet in the print constructor, alongside the periodic table.
• An acid-base indicators page covering litmus, phenolphthalein, methyl orange, and universal indicator, with a draggable pH scale showing the color each one turns at any point from 0 to 14.
• A bottom navigation bar on phones and touch devices.
• A keyboard shortcuts list.
• Keyboard zoom on the nuclides table.
• Binding energy per nucleon and neutron and proton separation energies on nuclide pages.
• A color-coded spectral range on the emission spectrum, for narrowing it to a range of bands or to a single one.

Changed

• Zooming the periodic table with buttons or keyboard now applies instantly, without an animation.
• Revamped desktop and mobile menus.

Fixed

• Printed tinted cells now use the same text color as the interactive table.

Added

• Interactive periodic table in both the modern 18-column long form and the 8-group short form.
• Filtering by category, block, occurrence, biological role, electrical type, and magnetic ordering.
• A temperature slider showing the phase of every element at a chosen temperature.
• A heatmap overlay for any of the numeric properties.
• Pan and zoom on the table.
• Element detail pages covering:
  • General information.
  • Atomic properties with visualized Bohr model, electron configuration, radii, oxidation states, and crystal structure.
  • Thermodynamic properties with visualized phase and heating curve.
  • Electromagnetic properties with visualized spectroscopy.
  • Isotopes table.
• A searchable, sortable element list.
  • A trends page plotting any numeric property against atomic number.
• Side-by-side comparison of elements.
• A table of known nuclides, colored by decay mode, half-life, energies, mass excess, spin, year discovered, and abundance, with a detail view and decay chain for each one.
• A print constructor that composes a printable periodic table, exportable as SVG or PNG.
• Unit preferences for temperature, energy, distance, and abundance.
• Light, dark, and system themes.
  • Filled, empty, framed, tinted, and card element cell styles.
• Full English and Ukrainian translations.
• Installable as a progressive web app.
• A feedback form for reporting bugs and suggesting features.