Meitnerium

Meitnerium (Mt)

Half-life of approximately 5 ms. The creation of this element demonstrated that fusion techniques could indeed be used to make new, heavy nuclei. Made and identified by physicists of the Heavy Ion Research Laboratory, Darmstadt, West Germany in 1982. Named in honor of Lise Meitner, the Austrian physicist.
Atomic Number109
Atomic Weight276
Mass Number265
Group9
Period7
Blockd
Protons109 p+
Neutrons156 n0
Electrons109 e-
Electron shell 109 Meitnerium.svg Animated Bohr Model Enhanced Bohr Model Bohr Model Orbital Diagram

Properties

Atomic Radius
Atomic Volume
Covalent Radius
129 pm
Metallic Radius
Ionic Radius
Crystal Radius
Van der Waals radius
Density
37.4 g/cm³
Boiling Point
Melting Point
Electrons per shell2, 8, 18, 32, 32, 15, 2
Electronegativity
Electrophilicity
Proton Affinity
Electron Affinity
Ionization Potential
Heat of Vaporization
Heat of Fusion
Heat of Formation
Molar Heat Capacity
Specific Heat Capacity
Thermal Conductivity
Gas Basicity
Dipole Polarizability
34 a₀
C6 Dispersion Coefficient
Oxidation States3, 4, 6
Color
Colorless
Crystal Structure ()
Lattice Constant
Bulk Modulus
Electrical Resistivity
Electron Configuration[Rn] 5f14 6d7 7s2
Magnetic Ordering
Magnetic Susceptibility
PhaseSolid
Poisson Ratio
Shear Modulus
Young's Modulus
Allotropes
Alternate Names
Adiabatic Index
Appearance
Electric Conductivity
Critical Pressure
Critical Temperature
Curie Point
Electrical
Hardness
Magnetic Susceptibility
Magnetic
Neel Point
Neutron Cross Section
Neutron Mass Absorption
Gas Phase
Quantum Numbers
Refractive Index
Space Group
Speed of Sound
Superconducting Point
Thermal Expansion
Valence Electrons
Classification
CategoryTransition metals, Transition metals
CAS GroupVIIIA
IUPAC GroupVIII
Glawe Number
Mendeleev Number66
Pettifor Number
Geochemical Class
Goldschmidt Classsynthetic
Radioactivity
RadioactiveYes ☢️
Decay Mode
Half-Life
Lifetime
Abundance
Abundance in Earth's crust
Abundance in Oceans
Abundance in Human Body
Abundance in Meteor
Abundance in Sun
Abundance in Universena

Isotopes of Meitnerium

Stable Isotopes
Unstable Isotopes
265Mt 266Mt 267Mt 268Mt 269Mt 270Mt 271Mt 272Mt 273Mt 274Mt 275Mt 276Mt 277Mt 278Mt 279Mt

History

Meitnerium was first synthesized in 1982 by a German research team led by Peter Armbruster and Gottfried Münzenberg at the Institute for Heavy Ion Research (Gesellschaft für Schwerionenforschung) in Darmstadt. The team bombarded a target of bismuth-209 with accelerated nuclei of iron-58 and detected a single atom of the isotope meitnerium-266. Named after Lise Meitner, the Austrian physicist

DiscoverersHeavy Ion Research Laboratory (HIRL)
Discovery LocationGermany
Discovery Year1982
Name OriginNamed in honor of Lise Mietner
Meitnerium is harmful due to its radioactivity
Meitnerium has 7 isotopes whose half-lives are known

Uses

Meitnerium is used for scientific research purposes only. It has no significant commercial applications.

Sources

Obtained by bombarding bismuth-209 with iron-58.