Technical data for Americium

Overview
NameAmericium
SymbolAm
Atomic Number95
Atomic Weight243[note]
DensityN/A
Melting Point1176 °C
Boiling Point2011 °C

Thermal properties
PhaseSolid
Melting Point1176 °C
Boiling Point2011 °C
Absolute Melting Point1449 K
Absolute Boiling Point2284 K
Heat of FusionN/A
Heat of VaporizationN/A
Heat of CombustionN/A
Specific HeatN/A
Thermal Conductivity10 W/(m K)
Thermal ExpansionN/A

Bulk physical properties
DensityN/A
Density (Liquid)N/A
Thermal Conductivity10 W/(m K)
Thermal ExpansionN/A

Reactivity
Valence4
Electronegativity1.3
ElectronAffinityN/A
Ionization Energies
578 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockf
GroupN/A
Period7
Electron Configuration[Rn]5f77s2
ColorSilver
Discovery
1944 in United States
Gas phaseN/A
CAS NumberCAS7440-35-9

Electrical properties
Electrical TypeN/A
Electrical ConductivityN/A
ResistivityN/A
Superconducting Point0.6

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic Susceptibility5.15×10-8
Molar Magnetic Susceptibility1.251×10-8
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 StructureSimple Hexagonal
Lattice Angles
π/2, π/2, 2 π/3
Lattice Constants
346.81, 346.81, 1124.1 pm
Space Group NameP63/mmc
Space Group Number194

Nuclear Properties
Half-Life7388 y
Lifetime1.065×104 y

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