Technical data for Mendelevium

Overview
NameMendelevium
SymbolMd
Atomic Number101
Atomic Weight258[note]
DensityN/A
Melting Point827 °C
Boiling PointN/A

Thermal properties
PhaseN/A
Melting Point827 °C
Boiling PointN/A
Absolute Melting Point1.1×103 K
Absolute Boiling PointN/A
Heat of FusionN/A
Heat of VaporizationN/A
Heat of CombustionN/A
Specific HeatN/A
Thermal ConductivityN/A
Thermal ExpansionN/A

Bulk physical properties
DensityN/A
Density (Liquid)N/A
Thermal ConductivityN/A
Thermal ExpansionN/A

Reactivity
Valence3
Electronegativity1.3
ElectronAffinityN/A
Ionization Energies
635 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockf
GroupN/A
Period7
Electron Configuration[Rn]5f137s2
ColorN/A
Discovery
1955 in United States
Gas phaseN/A
CAS NumberCAS7440-11-1

Electrical properties
Electrical TypeN/A
Electrical ConductivityN/A
ResistivityN/A
Superconducting PointN/A

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic SusceptibilityN/A
Molar Magnetic SusceptibilityN/A
Volume Magnetic SusceptibilityN/A

Abundances
% in UniverseN/A
% in SunNone
% in MeteoritesNone
% in Earth's CrustNone
% in OceansNone
% in HumansNone

Atomic dimensions and structure
Atomic RadiusN/A
Covalent RadiusN/A
Van der Waals RadiusN/A
Crystal StructureN/A
Lattice AnglesN/A
Lattice ConstantsN/A
Space Group NameN/A
Space Group NumberN/A

Nuclear Properties
Half-Life51.5 d
Lifetime74.31 d

Notes on the properties of Mendelevium:
Atomic Weight: Atomic mass number given for longest lived isotope.