Symbol: RaAtomic Number: 88Atomic Weight: 226Classification: Alkaline earth metalPhase at Room Temperature: SolidDensity: 5.5 grams per cm cubedMelting Point: 700°C, 1292°FBoiling Point: 1140°C, 2084°FDisextended by: Marie and Pierre Curie in 1898Radium is the 6th aspect of the second column in the routine table. It is the heaviest of the alkaline earth metals. Radium atoms have actually 88 electrons and 88 protons with 2 valence electrons in the external shell.Characteristics and PropertiesUnder typical conditions radium is a silvery steel. It is incredibly radioactive emitting light rays that cause it to glow in the dark. When exposed to the air it will quickly form a black coating by reacting via the nitrogen in the air. It also reacts easily via various other aspects and substances consisting of water.The radiation given off by radium is exceptionally dangerous. It is over one million times as radioenergetic as uranium. Overexposure to radium have the right to cause cancer and also inevitably fatality. Marie Curie, among the original researchers who functioned via radium, eventually died of overexposure to radiation.Where is it discovered on Earth?Radium is a very rare facet on Earth. It is found in uranium ores. It takes about 7 tons of ore just to create a solitary gram of radium. It is created as a byproduct of uranium mining. Since it is so dangerous, only a couple of ounces are created each year.How is radium provided today?When radium was first found it had actually a number of provides. It was used in paints that would certainly glow. These paints were used on clocks, watches, and tools so civilization can view them in the dark. Other supplies consisted of cancer treatment, toothpaste, and also research experiments.Today radium does not have any significant industrial provides due to the peril of its radiotask.

You are watching: How many valence electrons does radium have

How was it discovered?
Marie Curie and also her husband Pierre discovered the element while experimenting through the mineral referred to as pitchblende in 1898. It took another 12 years for Marie Curie to finally isolate metallic radium in 1910.Wright here did radium acquire its name?The name comes from the Latin word "radius" which implies ray. They called it after the rays that were emitted from the aspect.IsotopesThere are 4 naturally arising isotopes of radium. The the majority of plentiful is radium-226 which has a half-life of 1600 years. None of the isotopes are secure. They are all produced by the decay of the aspects uranium and also thorium.Interesting Facts about RadiumThe element "curium" is called for the discoverers of radium.Marie Curie also discovered the facet polonium while exploring through pitchblende.Before the dangers of radiation were understood, radium was called the wonder metal because it provided off warm and also light.Radium is part of a degeneration chain wbelow it will progressively degeneration into radon, then polonium, and lastly lead.The unit for measuring radiotask is dubbed the "curie" after scientists Marie and also Pierre Curie.
More on the Elements and the Periodic TableElementsPeriodic Table
Alkali MetalsLithiumSodiumPotassiumAlkaline Planet MetalsBerylliumMagnesiumCalciumRadiumTransition MetalsScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincSilverPlatinumGoldMercuryPost-transition MetalsAluminumGalliumTinLeadMetalloidsBoronSiliconGermaniumArsenicNonmetalsHydrogenCarbonNitrogenOxygenPhosphorusSulfurHalogensFluorineChlorineIodineNoble GasesHeliumNeonArgonLanthanides and also ActinidesUraniumPlutonium
More Chemistry Subjects
MatterAtomMoleculesIsotopesSolids, Liquids, GasesMelting and also BoilingChemical BondingChemical ReactionsRadiotask and RadiationMixtures and also CompoundsNaming CompoundsMixturesSeparating MixturesSolutionsAcids and BasesCrystalsMetalsSalts and also SoapsWaterOtherGlossary and also TermsChemistry Lab EquipmentOrganic ChemistryFamous Chemists

See more: Does Helium Kill Brain Cells, Effects Of Helium On The Brain


HomeworkAnimalsMathHistoryBiographyMoney and also FinanceBiographyArtistsCivil Rights LeadersEntrepreneursExplorersInventors and also ScientistsWomales LeadersWorld LeadersUS Pcitizens US HistoryNative AmericansColonial AmericaAmerihave the right to RevolutionIndustrial RevolutionAmerideserve to Civil WarWestward ExpansionThe Great DepressionCivil Rights MovementPre-1900s1900 to PresentUS GovernmentUS State HistoryScienceBiologyChemistryPlanet SciencePhysics World HistoryOld AfricaOld ChinaAncient EgyptAncient GreeceAncient MesopotamiaAncient RomeMiddle AgesIslamic EmpireRenaissanceAztec, Maya, IncaFrench RevolutionWorld War 1World War 2Cold WarArt HistoryGeographyUnited StatesAfricaAsiaCentral AmericaEuropeMiddle EastNorth AmericaOceaniaSouth AmericaSoutheast AsiaFun StuffEducational GamesHolidaysJokes for KidsMoviesMusicSports