KidzSearch Image Safe Search   



Barium,  56Ba
Template:Infobox element/symbol-to-top-image/alt
General properties
Pronunciation/ˈbɛəriəm/ (BAIR-ee-əm)
Appearancesilvery gray; with a pale yellow tint
Standard atomic weight (Ar, standard)137.327(7)
Barium in the periodic table
HydrogenHelium
LithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeon
SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon
PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromineKrypton
RubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodineXenon
CaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercury (element)ThalliumLeadBismuthPoloniumAstatineRadon
FranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessineOganesson
Sr

Ba

Ra
caesiumbariumlanthanum
Atomic number (Z)56
Groupgroup 2 (alkaline earth metals)
Periodperiod 6
Blocks-block
Element category  alkaline earth metals
Electron configuration[Xe] 6s2
Electrons per shell
2, 8, 18, 18, 8, 2
Physical properties
Phase at STPBa: Solid
Melting point1000 K ​(727 °C, ​1341 °F)
Boiling point2118 K ​(1845 °C, ​3353 °F)
Density (near r.t.)3.51 g/cm3
when liquid (at m.p.)3.338 g/cm3
Heat of fusion7.12 kJ/mol
Heat of vaporization142 kJ/mol
Molar heat capacity28.07 J/(mol·K)
Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)91110381185138816862170
Atomic properties
Oxidation states+1, +2 (a strongly basic oxide)
ElectronegativityPauling scale: 0.89
Ionization energies
  • 1st: 502.9 kJ/mol
  • 2nd: 965.2 kJ/mol
  • 3rd: 3600 kJ/mol
Atomic radiusempirical: 222 pm
Covalent radius215±11 pm
Van der Waals radius268 pm
Color lines in a spectral range
Spectral lines of barium
Other properties
Natural occurrenceBa: Primordial
Crystal structurebody-centered cubic (bcc)
Body-centered cubic crystal structure for barium
Speed of sound thin rod1620 m/s (at 20 °C)
Thermal expansion20.6 µm/(m·K) (at 25 °C)
Thermal conductivity18.4 W/(m·K)
Electrical resistivity332 nΩ·m (at 20 °C)
Magnetic orderingparamagnetic
Magnetic susceptibility+20.6·10−6 cm3/mol
Young's modulus13 GPa
Shear modulus4.9 GPa
Bulk modulus9.6 GPa
Mohs hardness1.25
CAS Number7440-39-3
History
DiscoveryCarl Wilhelm Scheele (1772)
First isolationHumphry Davy (1808)
Main isotopes of barium
Iso­topeAbun­danceHalf-life (1/2)Decay modePro­duct
130Ba0.11%(0.5–2.7)×1021 yεε130Xe
132Ba0.10%stable
133Basyn10.51 yε133Cs
134Ba2.42%stable
135Ba6.59%stable
136Ba7.85%stable
137Ba11.23%stable
138Ba71.70%stable
| references
Corroded barium metal

Barium is chemical element 56 on the periodic table. Its symbol is Ba. It contains 56 protons and 56 electrons. Its mass number is about 137.3. It is a metal.

 view more...





   Related Content
    • barium carbonate
    • barium peroxide
    • barium nitrate
    • barium oxide
    • barium hydroxide
    • barium facts
    • barium rock
    • barium sulfate
    • barium the element
    • barium sulfide


Not Finding Your Answer?
Post It On KidzTalk Homework Help


   Report a search problem







COMPANY RESOURCES LINKS SOCIAL
contact us education daily journal home facebook
about us make us your default search kidztalk twitter  
terms/privacy blocking websites kidznet pinterest  
advertise teacher zone wiki    
media link to us learning sites    
business / api solutions add a site image search    
affiliate program kidzsearch apps kidztube    
play youtube on kidzsearch games    
  voice search music    
  report a problem cool facts    
  settings news    
    search help    
       
         










 mobile version

      Copyright 2005-2024 KidzSearch.com