π¨ArgonAr, atomic number 18, a gas. Fills light bulbs and shields welds. Its name is Greek for lazy.
π§ͺAstatineAt, atomic number 85, a solid. No use outside research. Its name is Greek for unstable.
π§BromineBr, atomic number 35, a liquid. Red-brown and named for its stench. Goes into flame retardants.
π§ͺCarbonC, atomic number 6, a solid. Graphite, diamond and charcoal are all carbon. Its name is Latin for charcoal.
π¨ChlorineCl, atomic number 17, a gas. Greenish yellow. Makes drinking water and swimming pools safe.
π¨FluorineF, atomic number 9, a gas. Fluorides go into toothpaste, and hydrofluoric acid etches glass.
π¨HeliumHe, atomic number 2, a gas. Lifts balloons and blimps. First seen in the Sun's spectrum, in 1868.
π¨HydrogenH, atomic number 1, a gas. Makes ammonia for fertilizer and, as a liquid, fuels rockets.
π§ͺIodineI, atomic number 53, a solid. Turns starch deep blue, a classic lab test. Named for its violet vapor.
π¨KryptonKr, atomic number 36, a gas. Camera flash lamps. From 1960 to 1983 its orange-red light defined the meter.
π¨NeonNe, atomic number 10, a gas. Lights up advertising signs, its largest use. Its name is Greek for new.
π¨NitrogenN, atomic number 7, a gas. About 78% of the air. Turned into ammonia for fertilizer.
π¨OganessonOg, atomic number 118, expected to be a gas. The highest atomic number. Named for physicist Yuri Oganessian.
π¨OxygenO, atomic number 8, a gas. About 21% of the air. Needed for breathing and for anything to burn.
π§ͺPhosphorusP, atomic number 15, a solid. Fertilizers and safety matches. Its name is Greek for light bearing.
π¨RadonRn, atomic number 86, a gas. Radioactive, and given off as radium decays. Found by Friedrich Dorn in 1900.
π§ͺSeleniumSe, atomic number 34, a solid. Conducts better in light, so it runs photocells. Named for Selene, the Moon.
π§ͺSulfurS, atomic number 16, a solid. Pale yellow. Makes sulfuric acid, vulcanizes rubber and goes into gunpowder.
π§ͺTennessineTs, atomic number 117, expected to be a solid. Named for Tennessee, home of Oak Ridge National Laboratory.
π¨XenonXe, atomic number 54, a gas. Camera flashes and strobe lights, and the fuel for ion engines in space.
Lanthanides 15
π§²CeriumCe, atomic number 58, a solid. The most abundant rare earth. Sparks in lighter flints. Named after Ceres.
π§²DysprosiumDy, atomic number 66, a solid. Laser materials. Its name is Greek for hard to get at.
π§²ErbiumEr, atomic number 68, a solid. Boosts signals in fiber optic cable and tints glass pink. Named after Ytterby.
π§²EuropiumEu, atomic number 63, a solid. Made the red glow in television screens. Named after Europe.
π§²GadoliniumGd, atomic number 64, a solid. Captures neutrons better than any other element. Named for Johan Gadolin.
π§²HolmiumHo, atomic number 67, a solid. Few uses, but unusual magnetism. Named for Stockholm, Holmia in Latin.
π§²LanthanumLa, atomic number 57, a solid. Camera lens glass and lighter flints. Its name is Greek for to lie hidden.
π§²LutetiumLu, atomic number 71, a solid. A catalyst in oil refining. Named for Lutetia, the ancient name of Paris.
π§²NeodymiumNd, atomic number 60, a solid. Powerful permanent magnets; also tints glass violet. Its name means new twin.
π§²PraseodymiumPr, atomic number 59, a solid. Colors glass yellow and goes into welder's goggles. Its name means green twin.
π§²PromethiumPm, atomic number 61, a solid. All its isotopes are radioactive. Named for Prometheus, who stole fire.
π§²SamariumSm, atomic number 62, a solid. Samarium-cobalt magnets. Named for samarskite, the mineral it was found in.
π§²TerbiumTb, atomic number 65, a solid. Green phosphor in screens. One of four elements named after Ytterby in Sweden.
π§²ThuliumTm, atomic number 69, a solid. The least abundant natural rare earth. Named for Thule, the far north.
π§²YtterbiumYb, atomic number 70, a solid. Strengthens stainless steel. Named, like three other elements, after Ytterby.
Actinides 15
β’οΈActiniumAc, atomic number 89, a solid. A source of neutrons. Its name comes from the Greek for beam or ray.
β’οΈAmericiumAm, atomic number 95, a solid. In household smoke detectors. Named for America, as europium is for Europe.
β’οΈBerkeliumBk, atomic number 97, a solid. First made in December 1949. Named after Berkeley, California, its birthplace.
β’οΈCaliforniumCf, atomic number 98, a solid. A strong neutron source that helps find gold and silver ores.
β’οΈCuriumCm, atomic number 96, a solid. Made only in tiny amounts. Named after Marie and Pierre Curie.
β’οΈEinsteiniumEs, atomic number 99, a solid. Found in the debris of a 1952 thermonuclear test. Named for Albert Einstein.
β’οΈFermiumFm, atomic number 100, a solid. Named for Enrico Fermi, who built the first nuclear reactor. Found in 1952.
β’οΈLawrenciumLr, atomic number 103, a solid. First made in 1961. Named for Ernest Lawrence, who invented the cyclotron.
β’οΈMendeleviumMd, atomic number 101, a solid. Named for Dmitri Mendeleev, the chemist who devised the periodic table.
β’οΈNeptuniumNp, atomic number 93, a solid. Neutron detectors. Named for Neptune, since that planet follows Uranus going outward.
β’οΈNobeliumNo, atomic number 102, a solid. No use outside research. Named for Alfred Nobel, who invented dynamite.
β’οΈPlutoniumPu, atomic number 94, a solid. Plutonium-238 powers space probes. Named after Pluto.
β’οΈProtactiniumPa, atomic number 91, a solid. No use outside research. Its name means before actinium, which it decays into.
β’οΈThoriumTh, atomic number 90, a solid. Mantles for gas lanterns. Named for Thor, the Scandinavian god of thunder.
β’οΈUraniumU, atomic number 92, a solid. Fuel for nuclear power plants. Named for the planet Uranus.
How this list was compiled: Names, symbols, atomic numbers, atomic masses, standard states at room temperature and element categories: the PubChem periodic table from the US National Library of Medicine, https://pubchem.ncbi.nlm.nih.gov/periodic-table/ (states for elements 110 to 118 are PubChem's 'expected' values, because too few atoms have been made to observe one). Uses, name origins and discovery dates: the PubChem element pages, https://pubchem.ncbi.nlm.nih.gov/element/1 to /118, which carry text from Jefferson Lab, Los Alamos National Laboratory and IUPAC. The count of 118 named elements: https://iupac.org/what-we-do/periodic-table-of-elements/. Atomic numbers 95 to 118 as the synthetic elements: https://en.wikipedia.org/wiki/Synthetic_element. The IUPAC spellings aluminium and caesium, shown in brackets: https://en.wikipedia.org/wiki/Aluminium and https://en.wikipedia.org/wiki/Caesium. Four elements named after Ytterby: https://en.wikipedia.org/wiki/Ytterby. Single facts that the PubChem text does not carry come from the English Wikipedia articles Gallium (melts in the hand), Germanium (fiber optics), Promethium (no stable isotope), Rhenium (jet engines), Indium (display coatings), Neodymium (magnets), Plutonium (named after Pluto), Livermorium (name) and Oganesson (highest atomic number), each at https://en.wikipedia.org/wiki/ plus the element name. All checked 2026-09-18. Corrected 2026-09-19: bohrium is dated to the 1981 synthesis at GSI Darmstadt, which the IUPAC and IUPAP working group recognised in 1992 (the 1976 Dubna report was judged not convincing), and silver is the best conductor of heat and electricity of any metal, since diamond conducts heat better: https://en.wikipedia.org/wiki/Bohrium and https://en.wikipedia.org/wiki/Silver, both checked 2026-09-19. x.phase repeats x.state with the nine expected values (elements 110 to 118) gathered under one value, expected, so the page can filter on it. Licence: own work
How it works
The whole periodic table is in the draw: 118 elements, hydrogen to oganesson. One press deals five, perhaps gallium, tungsten and neon. Every card carries the symbol, atomic number, state at room temperature and one use, or the story behind the name where no use exists yet.
Read the full guide
Give me a random element, then what?
Run a symbol quiz: tap First 20 elements, then Hide all symbols and facts. Each card now shows a name only, so say the symbol and tap the cover to check. Or work backwards: pick a number 1 to 20 and name the element with that atomic number. As a class starter, draw 3 and ask what they share.
Solid, liquid or gas, and the nine marked expected
The State row filters on the state at room temperature, as PubChem lists it: 96 solids and 11 gases. Mercury and bromine are the only two elements that are liquid at room temperature. From darmstadtium at 110 to oganesson at 118 the card says expected. These have only been made a few atoms at a time, never as a sample large enough to see, so they get a chip of their own.
Two names carry a second spelling in brackets. Aluminium and caesium are the IUPAC spellings, aluminum and cesium the American ones.
One Swedish village named four elements. Yttrium, terbium, erbium and ytterbium all honor Ytterby, whose quarry held their ore.
A symbol that looks wrong comes from an older name. Na is natrium, K is kalium, Sb is stibium, Hg is hydrargyrum, W is wolfram.
Questions and answers
Does it cover the whole periodic table?
Yes. The random element generator holds 118 elements, every one named so far: 12 alkali and alkaline earth metals, 38 transition metals, 18 post-transition metals and metalloids, 20 nonmetals, halogens and noble gases, 15 lanthanides and 15 actinides. Two more chips cut across those six, the first 20 and the 24 synthetic, and the Period row keeps a draw to one row of the table.
Why do some cards tell a name story and give no use?
There is no use to give. From einsteinium at 99 upward, PubChem lists nothing outside basic research, and astatine, francium and protactinium are no different. Most of those cards say who or what the element honors: Lise Meitner, the town of Dubna, the state of Tennessee.
Which elements are synthetic?
The Synthetic elements chip holds atomic numbers 95 to 118, americium to oganesson. These 24 do not occur naturally on Earth and were first created between 1944 and 2010. Technetium came first, in 1937, but traces were later found in nature, as they were for promethium, astatine, neptunium and plutonium, so those five sit outside the chip.