Elementi za kikemia

Jina la Elementi)Kiingereza (IUPAC)AlamaNamba atomiaUzani atomia [u]Densiti [kg/m³] (20°C)Kiwango  cha kuyeyuka (°C)Kiwango  cha kuchemka (°C)Iligunduliwa mwakaKutambuliwa naAktiniactiniumAc89227,0310070104731971899DebierneAluminialuminiumAl1326,982700660,524671825ØrstedAmerikiamericiumAm95243,061367099426071944SeaborgStibiantimonySb51121,756690630,71750zamani(?)ArigoniargonAr1839,941,66 -189,4 −189,4 -185,9 −185,91894Ramsay,  StruttAsenikiarsenicAs3374,925720613 2)6132)11. Jhd.Albertus MagnusAstatiniastatineAt85209,993023371940SegrèBaribariumBa56137,33365072516401808DavyBerkeliberkeliumBk97247,07132509861949SeaborgBeriliberylliumBe49,011850127829701797VauquelinBismuthibismuthBi83208,989800271,415601540AgricolaBoribohriumBh107262,121976OganessianBoroniboriumB510,812460230025501808Davy,  Gay-LussacBromibromineBr 3579,903140 -007,3−7,358,81826BalardKadimicadmiumCd48112,4186403217651817Stromeyer und   HermannSizicesiumCs55132,91190028,46901860Kirchhoff,   BunsenKalisicalciumCa2040,078154083914871808DavyKalifonicaliforniumCf98251,08151009001950SeaborgSericeriumCe58140,11677079832571803von Hisinger, BerzeliusKlorinichlorineCl1735,452,95 -101−101 -034,6 −34,61774ScheeleKromichromiumCr2452,007140185724821797VauquelinKobalticobaltCo2758,9338890149528701735BrandtKuricuriumCm96247,0713510134031101944SeaborgDarmstatidarmstadtiumDs1102691994GSIDubnidubniumDb105262,111967/70GhiorsoDisprosiDisprosiDy66162,58560140923351886Lecoq de BoisbaudranEinsteinieinsteiniumEs99252,088601952SeaborgFeri (chuma) (chuma)ironFe2655,85787015352750zamani(?)ErbierbiumEr68167,269050152225101842MosanderEuropieuropiumEu63151,96525082215971901DemarçayFermifermiumFm100257,101952SeaborgFloriniflourineF919,001,58 -219,6−219,6 -188,1 −188,11886MoissanFransifranciumFr87223,02276771939PereyGadolinigaboliniumGd64157,257890131132331880de MarignacGaligalliumGa3169,72591029,824031875Lecoq de BoisbaudranGermanigermaniumGe3272,615320937,428301886WinklerAuri (dhahabu)goldAu79196,97193201064,42940zamani(?)HafniHf72178,4913310215054001923Coster,   de HevesyHassiHs108265,001984GSIHeliHe24,000,170 -272,2−272,2 -268,9 −268,91895Ramsay,  CrookesHolmi ?holmiumHo67164,938780147027201878SoretHidrojenihydrogenH11,010,084 -259,1 −259,1 -252,9 −252,91766CavendishIndiindiumIn49114,827310156,220801863Reich,  RichterIodiniiodineI53126,904940113,5184,41811CourtoisIridiiridiumIr77192,2222560241041301803TennantKalipotassiumK1939,09886063,77741807DavyKabonicarbonC612,011351035504827zamani(?)KriptonikryptonKr3683,803,48 -156,6−156,6 -152,3−152,31898Ramsay,  TraversKupricopperCu2963,5589201083,52595zamani(?)LanthaniLa57138,90616092034541839MosanderLawirensilawrenciumLr103260,1016271961GhiorsoLithiLi36,94530180,513171817ArfwedsonLutetiLu71175,009840165633151907von Welsbach,  UrbainMagnesiMg1224,301740648,811071828BussyManganisiMn2554,907440124420971774GahnMaitnirimeitneriumMt1092661982GSIMendelevimedeleviumMd101258,11955SeaborgMolibdenimolybdenumMo4295,9410280261755601778ScheeleNatrisodiumNa1122,9997097,88921807DavyNeodimineodynNd60144,247000101031271895von WelsbachNeonineonNe1020,180,84 -248,7 −248,7 -246,1 −246,11898Ramsay  TraversNeptunineptuniumNp93237,052048064039021940McMillan  AbelsonNikelinickelNi2858,698910145327321751CronstedtNiobiniobiumNb4192,918580246849271801HatchetNitrojeninitrogenN714,011,170 -209,9 −209,9 -195,8 −195,81771ScheeleNobelinobeliumNo102259,101958SeaborgOsmiosmiumOs76190,222590304550271803TennantPaladipalladiumPd46106,4212020155231401803WollastonPlumbileadPb82207,211340327,51740zamani(?)PosforiphosphorusP1530,971820442801669BrandPlatiniplatiniumPt78195,0821450177238271557ScaligerPlutoniplutoniumPu94244,061974064133271940SeaborgPolonipoloniumPo84208,9892002549621898Marie CuriePraseodimipraseodymiumPr59140,91648093132121895von WelsbachPromethipromethiumPm61146,927220108027301945MarinskyProtaktiniprotactiniumPa91231,0415370155440301917Fajans  Hahn,  MeitnerHidrajirimercuryHg80200,5913550 -038,9 −38,9356,6zamani(?)Radi (elementi)radiumRa88226,03550070011401898Marie und  Pierre CurieRadoniradonRn86222,029,23 -071 −71 -061,8 −61,81900DornRenirheniumRe75186,2121030318056271925Noddack,  Tacke,  BergRodirhodiumRh45102,9112410196637271803WollastonRentgeniRg1112721994GSIRubidiRb3785,451530396881861Bunsen,  KirchhoffRutheniRu44101,0712450231039001844ClausRutherfordiRf104261,111964/69GhiorsoSamariSm62150,367540107217781879Lecoq de BoisbaudranOksijenioxygenO816,001,33 -218,4 −218,4 -182,9 −182,91774Priestley,  ScheeleSkandiscandiumSc2144,962990153928321879NilsonSulfurisulfurS1632,072060113444,7zamani(?)SiborgiseaborgiumSg106263,121974OganessianSeleniSe3478,9648202176851817BerzeliusAgentisilverAg47107,8710490961,92212zamani(?)SilikonisiliconSi1428,092330141023551824BerzeliusStanitinSn50118,7172902322270zamani(?)StrontistrontiumSr3887,62263076913841798KlaprothTantalitantalumTa73180,9516680299654251802EkebergTekinetitechnetiumTc4398,9111490217250301937SegrèTelurotelluriumTe52127,66250449,69901782von ReichensteinTaribiterbiumTb65158,938250136030411843MosanderTalithalliumTl81204,3811850303,614571861CrookesThorithoriumTh90232,0411720175047871829BerzeliusThulithuliumTm69168,939320154517271879CleveTitanititaniumTi2247,884510166032601791Gregor,  KlaprothUnunbiununbiumUub1122771996GSIUnunheksiununhexiumUuh1162892000JINRUnunoktiununoctiumUuo1182932006JINRUnunpentiununpentiumUup1152882006JINRUnunkadiununquadiumUuq1142891999JINRUnuntriununtriumUut1132872006JINRUraniuraniumU92238,03189701132,438181789KlaprothVanadivanadiumV2350,946090189033801801del RíoWolframitungstenW74183,8519260340759271783Fausto und Juan  de ElhuyarYitebiytterbiumYb70173,04697082411931878de MarignacYitriyttriumY3988,914470152333371794GadolinZinkizincZn3065,397140419,6907zamani(?)ZenonixenonXe54131,294,49 -111,9 −111,9 -107,0 −1071898Ramsay,   TraversZirikonizirconiumZr4091,226510185243771789Klaproth

Question: Hidrojeni iligunduliwa mwaka gani?
Answer: 176