Periodic Table & Elements 1-21
21 entries in the Periodic Table & Elements compendium.
DarmstadtiumIn the periodic table, it is a d-block transactinide element, a member of the 7th period aDubniumSynthetic 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 darmstadtiumGroup 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.
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