Mendelevium

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

Content

General data

Atomar properties

Electron configutation

General Information about Mendelevium

Regular nameMendeleviumChemical symbolMdOther namesSystematic nameHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Mendelevium

Atomic number Z101 = number of protonsStandard Atomic Weight258.098432704

Electron configuration of Mendelevium

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	10	14	2	6	10	13	2	6			2

Abbreviated form: [Rn] 5f¹³ 7s² .

Ionization Energies of Mendelevium

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 Mendelevium atom.

IE1
6.58

Isotopic Data of Mendelevium

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

Chemistry of Mendelevium

Valence electrons3Oxidation states+ 3Electronegativity1.3 (Pauling original)
1.30 (Pauling)
1.2 (Allred-Rochow)Electron affinity0.98 eV
93.91 kJ mol^-1

Standard Electrode Potential

E⁰ (V)	Symbol	N_ox	Name Ox. Name Red.	Ox. Red.	e^-
-2.5	Md	+II 0	Mendelevium(II) cation Mendelevium	Md²⁺ ⇄ Md	+ 2 e^-
-1.74	Md	+III 0	Mendelevium(III) cation Mendelevium	Md³⁺ ⇄ Md	+ 3 e^-
-0.16	Md	+III +II	Mendelevium(III) cation Mendelevium(II) cation	Md³⁺ ⇄ Md²⁺	+ 1 e^-

Material and Physical Properties

Melting point827 °CDensity10.3(7) g cm^-3

External Data, Identifiers

CAS registry number7440-11-1InChI =1S/MdInChIKeyMQVSLOYRCXQRPM-UHFFFAOYSA-NPubChem ID23943

More Chemistry

isotopes

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Last update: 2022-12-12

Perma link: https://www.chemlin.org/chemical-elements/mendelevium.php