Element Strontium - Sr

Comprehensive data on the chemical element Strontium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Strontium. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one"s studies.

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Strontium Menu

Strontium Page OneOverview of StrontiumStrontium"s Name in Other LanguagesAtomic Structure of StrontiumChemical Properties of StrontiumPhysical Properties of StrontiumRegulatory / HealthWho/When/Where/HowStrontium Page TwoNuclides / IsotopesPotential Parent NuclidesStrontium Page ThreeCommon Chemical Compounds of Strontium

Overview of Strontium

Atomic Number: 38Group: 2Period: 5Series: Alkali Earth Metals

Strontium"s Name in Other Languages

Latin: StrontiumCzech: StronciumCroatian: StroncijFrench: StrontiumGerman: Strontium - sItalian: StronzioNorwegian: StrontiumPortuguese: EstrôncioRussian: СтронцийSpanish: EstroncioSwedish: StrontiumAtomic Structure of StrontiumAtomic Radius: 2.45ÅAtomic Volume: 33.7cm3/molCovalent Radius: 1.91ÅCross Section (Thermal Neutron Capture) σa/barns: 1.28Crystal Structure: Cubic face centered
Electron Configuration:1s2 2s2p6 3s2p6d10 4s2p6 5s2Electrons per Energy Level: 2,8,18,8,2Shell Model
Ionic Radius:
1.12ÅFilling Orbital: 5s2Number of Electrons (with no charge): 38Number of Neutrons (most common/stable nuclide): 50Number of Protons: 38Oxidation States: 2Valence Electrons: 5s2Electron Dot Model

Chemical Properties of Strontium

Electrochemical Equivalent:
1.635g/amp-hrElectron Work Function: 2.59eVElectronegativity: 0.95 (Pauling); 0.99 (Allrod Rochow)Heat of Fusion: 8.3kJ/molIncompatibilities:Ionization PotentialFirst: 5.695Second: 11.03Third: 43.6Valence Electron Potential (-eV): 25.7

Physical Properties of Strontium

Atomic Mass Average: 87.62Boiling Point: 1657K 1384°C 2523°FCoefficient of lineal thermal expansion/K-1: 23E-6ConductivityElectrical: 0.0762 106/cm ΩThermal: 0.353 W/cmKDensity: 2.54g/cc
300KDescription:Soft silvery yellow metal that will burn if ignited in air.Elastic Modulus:Bulk: 12/GPaRigidity: 6.03/GPaYoungs: 15.7/GPaEnthalpy of Atomization: 163.2 kJ/mole
25°CEnthalpy of Fusion: 9.16 kJ/moleEnthalpy of Vaporization: 150 kJ/moleFlammablity Class:Freezing Point: see melting pointHardness ScaleMohs: 1.5Heat of Vaporization: 144kJ/molMelting Point: 1042K 769°C 1416°FMolar Volume: 33.7 cm3/molePhysical State (at 20°C & 1atm): SolidSpecific Heat: 0.3J/gKVapor Pressure = 246Pa

Regulatory / Health

CAS Number7440-24-6OSHA Permissible Exposure Limit (PEL)No limits set by OSHAOSHA PEL Vacated 1989No limits set by OSHANIOSH Recommended Exposure Limit (REL)No limits set by NIOSH Levels In Humans:Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.Blood/mg dm-3: 0.031Bone/p.p.m: 36-140Liver/p.p.m: 0.05-0.36Muscle/p.p.m: 0.12-0.35Daily Dietary Intake: 0.8-5 mgTotal Mass In Avg. 70kg human: 320 mgDiscovery Year: 1790Name Origin:From Strontian a small Scottish town.Abundance of Strontium:Earth"s Crust/p.p.m.: 370Seawater/p.p.m.: Atlantic Suface: 7.6Atlantic Deep: 7.7Pacific Surface: 7.6Pacific Deep: 7.7Atmosphere/p.p.m.: N/ASun (Relative to H=1E12): 790Sources of Strontium:Found in minerals celestite and strontianite. Annual world wide production is around 137,000 tons. Primary mining areas are UK, Tunisia, Russia, Germany, Mexico and USA.Uses of Strontium:Used in flares and fireworks for crimson color. Also used in nuclear batteries in buoys and phosphorescent paint.Additional Notes:A. Crawford first recognized strontium as an element in 1790, but it wasn"t isolated until 1808 by Sir Humphry Davy in London England.

Strontium Menu

Strontium Page OneOverview of StrontiumStrontium"s Name in Other LanguagesAtomic Structure of StrontiumChemical Properties of StrontiumPhysical Properties of StrontiumRegulatory / HealthWho/When/Where/HowStrontium Page TwoNuclides / IsotopesPotential Parent NuclidesStrontium Page ThreeCommon Chemical Compounds of Strontium


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