Periodic Table & Elements
37 entries in the Periodic Table & Elements compendium.
DarmstadtiumThe synthetic superheavy element named after a German city.DubniumSynthetic element with shared discovery credit.EinsteiniumSynthetic element discovered in hydrogen bomb debris.Extended periodic tableHypothetical extension of the periodic table beyond element 118.FermiumSynthetic actinide element discovered in hydrogen bomb fallout.FleroviumSynthetic superheavy element near the island of stability.Group (periodic table)A column of elements with similar chemical properties.Group 10 elementGroup of d-block transition metals including nickel, palladium, platinum, and darmstadtium.Group 11 elementGroup of metals including copper, silver, gold, and roentgenium.Group 12 elementGroup 12 elements: soft metals with full d-shells.Group 3 elementFirst transition metal group, disputed composition, key to rare-earth chemistry.Group 4 elementGroup 4 transition metals: hard, corrosion-resistant, with a protective oxide layer.Group 5 elementGroup 5 elements are refractory transition metals with high melting points.Group 6 elementGroup 6 transition metals with high melting points and strategic uses.Group 7 elementGroup 7 transition metals with +7 oxidation state trends.Group 8 elementGroup 8: iron, ruthenium, osmium, and hassium.Group 9 elementRare transition metals including cobalt, rhodium, iridium, and meitnerium.HassiumSynthetic superheavy element discovered via cold fusion.LawrenciumSynthetic actinide element named after cyclotron inventor Ernest Lawrence.LivermoriumSynthetic superheavy element, named after Lawrence Livermore National Laboratory.LutetiumA rare earth element discovered amid priority disputes.TennessineSynthetic element 117, discovered by Russian–American collaboration.TechnetiumFirst predominantly artificial element, used in nuclear medicine.Superheavy elementSynthetic radioactive elements beyond atomic number 103.SeaborgiumSynthetic element named after Glenn T. Seaborg.RutherfordiumSynthetic element named after physicist Ernest Rutherford.RoentgeniumSynthetic element named after the discoverer of X-rays.PromethiumA rare, radioactive lanthanide with no stable isotopes.PlutoniumA radioactive actinide metal used in nuclear weapons and power.OganessonSynthetic element with the highest atomic number known.NobeliumSynthetic actinide element named after Alfred Nobel.NihoniumSynthetic, radioactive element in group 13.NeptuniumFirst transuranic element, radioactive and used in spacecraft power.MendeleviumSynthetic actinide element first produced one atom at a time.CuriumSynthetic radioactive element named after Marie and Pierre Curie.CoperniciumA synthetic, highly radioactive element named after Nicolaus Copernicus.CaliforniumA synthetic element used as a neutron source for reactors and medicine.
Browse Periodic Table & Elements in the interactive codex →