និមិត្តសញ្ញាគីមី: Current symbols

Current symbols

និមិត្តសញ្ញាឈ្មោះEtymology of symbolលេខអាតូមRelative atomic massក្រុមខួបMetalliccharacterAcអាក់ទីញ៉ូមfrom Greek aktinos (ray)89&227[227]The element does not have any stable nuclides, and a value in brackets, e.g. [209], indicates the mass number of the longest-lived isotope of the element. However, three elements, thorium, protactinium, and uranium, have a characteristic terrestrial isotopic composition, and thus their atomic mass given.  7 ActinideAgប្រាក់ (Silver)Latin argentum (silver)47&107.86822107.8682(2)The isotopic composition of this element varies in some geological specimens, and the variation may exceed the uncertainty stated in the table.115 Transition metalAlអាលុយមីញ៉ូម (Aluminum) Latin alumen (alum)13&026.9815386826.9815386(8)133 Other metalAmAmericiumthe Americas95&243[243] 7 ActinideArArgonGreek argon (inert)18&039.948139.948(1)The isotopic composition varies in terrestrial material such that a more precise atomic weight can not be given.183 ឧស្ម័នកំរAsArsenicGreek arsenikos (male)33&074.92160274.92160(2)154 MetalloidAtAstatineGreek astatos (unstable)85&210[210]176 MetalloidAuមាសLatin aurum (gold)79&196.9665694196.966569(4)116 Transition metalBBoronborax5&010.811710.811(7)The isotopic composition of the element can vary in commercial materials, which can cause the atomic weight to deviate significantly from the given value.132 MetalloidBaបារ៉្យូម (Barium)Greek barys (density)56&137.3277137.327(7)26 Alkaline earth metalBeបេរីល្យូម (Beryllium)beryl4&009.01218239.012182(3)22 Alkaline earth metalBhBohriumNiels Bohr107&264[264]77 Transition metalBiBismuth from German wiss muth (white-mass), becoming bismuth in English83&208.980401208.98040(1)156 Other metalBkBerkeliumBerkeley, California97&247[247] 7 ActinideBrBromineGreek bromos (stench)35&079.904179.904(1)174 Diatomic nonmetalCCarbonLatin carbo (charcoal)6&012.0107812.0107(8)142 Polyatomic nonmetalCaកាល់ស្យូម (Calcium)Latin calx (lime)20&040.078440.078(4)24 Alkaline earth metalCdCadmiumGreek kadmia (earth)48&112.4118112.411(8)125 Transition metalCeCeriumCeres58&140.1161140.116(1) 6 LanthanideCfCaliforniumState and University of California98&251[251] 7 ActinideClChlorineGreek chloros (green-yellow)17&035.453235.453(2)173 Diatomic nonmetalCmCuriumPierre and Marie Curie and the traditional -um ending96&247[247] 7 ActinideCnCoperniciumNicolaus Copernicus 112&285[285]127 Transition metalCoCobaltfrom German kobold27&058.933195558.933195(5)94 Transition metalCrChromiumGreek chroma (color)24&051.9961651.9961(6)64 Transition metalCsសេស្យូម (Cesium)Latin caesius (sky blue)55&132.90545192132.9054519(2)16 Alkali metalCuទង់ដែង (Copper)Latin Cuprum (Cyprus)29&063.546363.546(3)114 Transition metalDbDubniumDubna, Russia105&262[262]57 Transition metalDsDarmstadtiumDarmstadt, Germany110&271[271]107 UnknownDyDysprosiumGreek dysprositos66&162.5001162.500(1) 6 LanthanideErErbiumYtterby, Sweden68&167.2593167.259(3) 6 LanthanideEsEinsteiniumAlbert Einstein99&252[252] 7 ActinideEuEuropiumEurope63&151.9641151.964(1) 6 LanthanideFFluorineLatin fluo (flow)9&018.9984032518.9984032(5)172 Diatomic nonmetalFeដែក (Iron)Latin ferrum (iron)26&055.845255.845(2)84 Transition metalFlFleroviumFlerov Laboratory of Nuclear Reactions114&289[289]147 UnknownFmFermiumEnrico Fermi100&257[257] 7 ActinideFrហ្វ្រង់ស្យូម (Francium)France87&223[223]17 Alkali metalGaGalliumLatin Gallia (Gaul)31&069.723169.723(1)134 Other metalGdGadoliniumgadolinite64&157.253157.25(3) 6 LanthanideGeGermaniumGermany32&072.64172.64(1)144 MetalloidHអុីដ្រូសែន (Hydrogen)Greek hydor gennao (liquid-produce)1&001.0079471.00794(7)11 Diatomic nonmetalHeអេល្យូមGreek helios (Sun)2&004.00260224.002602(2)181 ឧស្ម័នកំរHfHafniumLatin Hafnia (Copenhagen)72&178.492178.49(2)46 Transition metalHgMercuryGreek hydrargyrum (liquid silver)80&200.592200.59(2)126 Transition metalHoHolmiumLatin Holmia (Stockholm)67&164.930322164.930 32(2) 6 LanthanideHsHassiumHesse, Germany108&277[277]87 Transition metalIIodineGreek ioeides (violet)53&126.904473126.904 47(3)175 Diatomic nonmetalInIndiumindigo blue49&114.8183114.818(3)135 Other metalIrIridiumGreek iris (rainbow)77&192.2173192.217(3)96 Transition metalKប៉ូតាស្យូម (Potassium)Latin kalium (potassium)19&039.0983139.0983(1)14 Alkali metalKrKryptonGreek kryptos (concealment)36&083.798283.798(2)184 ឧស្ម័នកំរLaឡង់តានGreek lanthano (escape)57&138.905477138.90547(7) 6 LanthanideLiលីចូម (Lithium)Greek lithos (rock)3&006.94126.941(2)The atomic weight of commercial Lithium can vary between 6.939 and 6.996—analysis of the specific material is necessary to find a more accurate value.12 Alkali metalLrLawrenciumErnest O. Lawrence103&262[262]37 ActinideLuLutetiumLatin Lutetia (Paris)71&174.9671174.967(1)36 LanthanideLvLivermoriumLawrence Livermore National Laboratory116&292[292]167 UnknownMdMendeleviumDmitri Mendeleyev101&258[258] 7 ActinideMgម៉ាញ៉េស្យូម (Magnesium)Magnesia, Greece12&024.3050624.3050(6)23 Alkaline earth metalMnManganeseGreek magnes (magnet)25&054.938045554.938045(5)74 Transition metalMoMolybdenumGreek molybdos (lead)42&095.94295.94(2)65 Transition metalMtMeitneriumLise Meitner109&268[268]97 UnknownNNitrogenGreek nitron (niter)7&014.0067214.0067(2)152 Diatomic nonmetalNaសូដ្យូម (Sodium)Latin natrium (sodium)11&022.98976928222.98976928(2)13 Alkali metalNbញ៉ូប្យូម (Niobium)Niobe41&092.90638292.906 38(2)55 Transition metalNdNeodymiumGreek neos didymos (novelty-twin)60&144.2423144.242(3) 6 LanthanideNeនេអុងGreek neos (novelty)10&020.1797620.1797(6)182 ឧស្ម័នកំរNiNickelGerman kupfernickel (nickeline)28&058.6934258.6934(2)104 Transition metalNoNobeliumAlfred Nobel102&259[259] 7 ActinideNpNeptuniumNeptune93&237[237] 7 ActinideO2អុកស៊ីសែនGreek oxys (acid)8&015.9994315.9994(3)162 Diatomic nonmetalOsOsmiumGreek osme (odor)76&190.233190.23(3)86 Transition metalPPhosphorusGreek phosphoros (light bearer)15&030.973762230.973762(2)153 Polyatomic nonmetalPaProtactiniumGreek protos and actinium91&231.035882231.03588(2) 7 ActinidePbLeadLatin plumbum (lead)82&207.21207.2(1)146 Other metalPdPalladiumPallas (genitive Pallados)46&106.421106.42(1)105 Transition metalPmPromethiumPrometheus61&145[145] 6 LanthanidePoPoloniumPoland84&210[210]166 Other metalPrPraseodymiumGreek prasios (green)59&140.907652140.90765(2) 6 LanthanidePtPlatinumSpanish platina (silver)78&195.0849195.084(9)106 Transition metalPuPlutoniumPluto94&244[244] 7 ActinideRaរ៉ាដ្យូម (Radium)Latin radius (ray)88&226[226]27 Alkaline earth metalRbរុយប៊ីដ្យូម (Rubidium)Latin rubidus (red)37&085.4678385.4678(3)15 Alkali metalReRheniumGerman Rhe75&186.2071186.207(1)76 Transition metalRfRutherfordiumErnest Rutherford104&26126147 Transition metalRgRoentgeniumWilhelm Conrad Röntgen111&272[272]117 UnknownRhRhodiumGreek rhodon (rose)45&102.905502102.905 50(2)95 Transition metalRnRadonradium and emanation86&220[220]186 ឧស្ម័នកំរRuRutheniumLatin Ruthenia (Russia)44&101.072101.07(2)85 Transition metalSSulfur (Sulphur)Latin sulfur16&032.065532.065(5)163 Polyatomic nonmetalSbAntimonyLatin stibium (eye liner)51&121.7601121.760(1)155 MetalloidScស្កង់ដ្យូម (Scandium)Scandinavia21&044.955912644.955912(6)34 Transition metalSeSeleniumGreek selene (Moon)34&078.96378.96(3)164 Polyatomic nonmetalSgSeaborgiumGlenn T. Seaborg106&266[266]67 Transition metalSiSiliconLatin silex (flint)14&028.0855328.0855(3)143 MetalloidSmSamariumsamarskite62&150.362150.36(2) 6 LanthanideSnTinLatin stannum (tin)50&118.7101118.710(7)145 Other metalSrស្ត្រុងចូម (Strontium)Strontian38&087.62187.62(1)25 Alkaline earth metalTaតង់ដាល់ (Tantalum)King Tantalus73&180.947882180.94788(2)56 Transition metalTbTerbiumYtterby, Sweden65&158.925352158.92535(2) 6 LanthanideTcTechnetiumGreek technetos (artificial)43&098[98]75 Transition metalTeTelluriumGreek tellus (Earth)52&127.603127.60(3)165 MetalloidThThoriumThor90&232.038062232.03806(2) 7 ActinideTiTitaniumthe Titans22&047.867147.867(1)44 Transition metalTlThalliumGreek thallos (shoot)81&204.38332204.3833(2)136 Other metalTmThuliumThule and the traditional -ium ending69&168.934212168.93421(2) 6 LanthanideUUraniumUranus92&238.028913238.02891(3) 7 ActinideUuoUnunoctiumLatin uni, uni, and oct (one, one, eight)118&294[294]187 UnknownUupUnunpentiumLatin uni, uni, and Greek pent (one, one, five)115&288[288]157 UnknownUusUnunseptiumLatin uni, uni, and sept (one, one, seven)117&294[294]177 UnknownUutUnuntriumLatin uni, uni, and Greek tri (one, one, three)113&284[284]137 UnknownVវ៉ាណាដ្យូម (Vanadium)Vanadis23&050.9415150.9415(1)54 Transition metalWTungstenGerman wolfram (wolf-froth)74&183.841183.84(1)66 Transition metalXeXenonGreek xenos (alien)54&131.2936131.293(6)185 ឧស្ម័នកំរYអុីទ្រីយ៉ូម (Yttrium)Ytterby, Sweden39&088.90585288.90585(2)35 Transition metalYbYtterbiumYtterby, Sweden70&173.043173.04(3) 6 LanthanideZnZincGerman zin (tin)30&065.409465.409(4)124 Transition metalZrZirconiumzircon40&091.224291.224(2)45 Transition metal

Antimatter atoms are denoted by a bar above the symbol for their matter counterpart, so e.g. H is the symbol for antihydrogen.