Strontium

Chemical, physical and material properties and data of the chemical element Strontium.

Content

General data

Atomar properties

Electron configutation

General Information about Strontium

Regular nameStrontiumChemical symbolSrOther namesSystematic nameHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Strontium

Atomic number Z38 = number of protonsStandard Atomic Weight87.62 (1)

Electron configuration of Strontium

1s	2s	2p	3s	3p	3d	4s	4p	4d	4f	5s	5p	5d	5f	6s	6p	6d	6f	7s	7p
2	2	6	2	6	10	2	6			2

Abbreviated form: [Kr] 5s² .

Ionization Energies of Strontium

The following table lists the ionization energies IE (ionization potentials); the IE is the energy required in electron volts (eV) per atom to separate a given electron from an Strontium atom.

IE1	IE2	IE3	IE4	IE5	IE6	IE7	IE8
5.69485	11.03019	42.88353	56.279	70.7	88	104	121.21

Isotopic Data of Strontium

An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Strontium isotopes.

Chemistry of Strontium

Oxidation states+2Electronegativity1.0 (Pauling original)
0.95 (Pauling)
0.963 (Allen)
0.96 (Sanderson)
0.99 (Allred-Rochow)
2.5849 eV (Gosh Gupta)
2.0 eV (Pearson)Electron affinity0.052 06(6) eV
5.023(6) kJ mol^-1

Standard Electrode Potential

E⁰ (V)	Symbol	N_ox	Name Ox. Name Red.	Ox. Red.	e^-
-4.10	Sr	+ I 0	Strontium(I) cation Strontium	Sr⁺ ⇄ Sr	+ 1 e^-
-2.899	Sr	+ II 0	Strontium cation Strontium	Sr²⁺ ⇄ Sr (s)	+ 2 e^-
-2.88	Sr	+ II 0	Strontium hydroxide Strontium	Sr(OH)₂ ⇄ Sr + 2 OH^-	+ 2 e^-
-1.793	Sr	+ II 0	Strontium(II) cation Strontium	Sr²⁺ ⇄ Sr (Amalgam Hg)	+ 2 e^-

Material and Physical Properties

Melting point777 °CEnthalpy of fusion (molar)7.43 kJ mol^-1Boiling point1377 °CEnthalpy of vaporization138.91 kJ mol^-1Density2.64 g cm^-3

External Data, Identifiers

CAS registry number7440-24-6InChI =1S/SrInChIKeyCIOAGBVUUVVLOB-UHFFFAOYSA-NPubChem ID5359327

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isotopes

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Last update: 2022-12-12

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