Meitnerium is a chemical element with symbol Mt and atomic number 109. It is an extremely radioactive synthetic element (an element not found in nature that can be created in a laboratory). The most stable known isotope, meitnerium-278, has a half-life of 7.6 seconds.
It belongs to group 9 of the periodic table having trivial name .
Meitnerium Facts
Read key information and facts about element Meitnerium
Name | Meitnerium |
Atomic Number | 109 |
Atomic Symbol | Mt |
Atomic Weight | 268 |
Phase | Solid |
Color | - |
Appearance | - |
Classification | Transition Metal |
Group in Periodic Table | 9 |
Group Name | cobalt family |
Period in Periodic Table | period 7 |
Block in Periodic Table | d -block |
Electronic Configuration | [Rn] 5f14 6d7 7s2 |
Electronic Shell Structure (Electrons per shell) | 2, 8, 18, 32, 32, 15, 2 |
Melting Point | - |
Boiling Point | - |
CAS Number | CAS54038-01-6 |
How to Locate Meitnerium on Periodic Table
Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of electrons. The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and ends at bottom right (atomic number 118). Therefore you can directly look for atomic number 109 to find Meitnerium on periodic table.
Another way to read periodic table and locate an element is by using group number (column) and period number (row). To locate Meitnerium on periodic table look for cross section of group 9 and period 7 in the modern periodic table.
Meitnerium History
The element Meitnerium was discovered by G. Münzenberg,P. Armbrusteret al.(GSI in Darmstadt) in year 1982 in Germany. Meitnerium was first isolated by in . Meitnerium derived its name from Lise Meitner, physicist.
Prepared by bombardment of bismuth with iron atoms.
Meitnerium Presence: Abundance in Nature and Around Us
The table below shows the abundance of Meitnerium in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body.
ppb by weight (1ppb =10^-7 %) | ppb by atoms (1ppb =10^-7 %) | |
---|---|---|
Abundance in Universe | - | - |
Abundance in Sun | - | - |
Abundance in Meteorites | - | - |
Abundance in Earth's Crust | - | - |
Abundance in Oceans | - | - |
Abundance in Humans | - | - |
Crystal Structure of Meitnerium
The solid state structure of Meitnerium is Face Centered Cubic.
The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in three dimensional space to form the structure.
Unit Cell Parameters
The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell edges Lattice Constants (a, b and c)
a | b | c |
---|---|---|
and the angles between them Lattice Angles (alpha, beta and gamma).
alpha | beta | gamma |
---|---|---|
The positions of the atoms inside the unit cell are described by the set of atomic positions ( xi, yi, zi) measured from a reference lattice point.
The symmetry properties of the crystal are described by the concept of space groups. All possible symmetric arrangements of particles in three-dimensional space are described by the 230 space groups (219 distinct types, or 230 if chiral copies are considered distinct.
Space Group Name | - |
Space Group Number | - |
Crystal Structure | Face Centered Cubic |
Number of atoms per unit cell | 4 |

The number of atoms per unit cell in a simple cubic, face-centered cubic and body-centred cubic are 1,4,2 respectively.
Meitnerium Atomic and Orbital Properties
Meitnerium atoms have 109 electrons and the electronic shell structure is [2, 8, 18, 32, 32, 15, 2] with Atomic Term Symbol (Quantum Numbers) 4F9/2.
Atomic Number | 109 |
Number of Electrons (with no charge) | 109 |
Number of Protons | 109 |
Mass Number | 268 |
Number of Neutrons | 159 |
Shell structure (Electrons per energy level) | 2, 8, 18, 32, 32, 15, 2 |
Electron Configuration | [Rn] 5f14 6d7 7s2 |
Valence Electrons | 6d7 7s2 |
Valence (Valency) | - |
Main Oxidation States | - |
Oxidation States | |
Atomic Term Symbol (Quantum Numbers) | 4F9/2 |
Bohr Atomic Model of Meitnerium - Electrons per energy level

n | s | p | d | f |
---|
Ground State Electronic Configuration of Meitnerium - neutral Meitnerium atom
Abbreviated electronic configuration of Meitnerium
The ground state abbreviated electronic configuration of Neutral Meitnerium atom is [Rn] 5f14 6d7 7s2. The portion of Meitnerium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Rn]. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used. This is important as it is the Valence electrons 6d7 7s2, electrons in the outermost shell that determine the chemical properties of the element.
Unabbreviated electronic configuration of neutral Meitnerium
Complete ground state electronic configuration for the Meitnerium atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f14 6d7 7s2
Electrons are filled in atomic orbitals as per the order determined by the Aufbau principle, Pauli Exclusion Principle and Hund’s Rule.

Atomic Structure of Meitnerium
Meitnerium atomic radius is - , while it's covalent radius is - .
Atomic Radius Calculated | - (0 Å) |
Atomic Radius Empirical | - (0 Å) |
Atomic Volume | - |
Covalent Radius | - |
Van der Waals Radius | - |
Neutron Cross Section | - |
Neutron Mass Absorption | - |
Atomic Spectrum of Meitnerium
Meitnerium Chemical Properties: Meitnerium Ionization Energies and electron affinity
The electron affinity of Meitnerium is - .
Valence | - |
Electronegativity | - |
ElectronAffinity | - |
Ionization Energy of Meitnerium
Refer to table below for Ionization energies of Meitnerium
Ionization energy number | Enthalpy - kJ/mol |
---|
Meitnerium Physical Properties
Refer to below table for Meitnerium Physical Properties
Density | - |
Molar Volume | - |
Elastic Properties
Young Modulus | - |
Shear Modulus | - |
Bulk Modulus | - |
Poisson Ratio | - |
Hardness of Meitnerium - Tests to Measure of Hardness of Element
Mohs Hardness | - |
Vickers Hardness | - |
Brinell Hardness | - |
Meitnerium Electrical Properties
Meitnerium is Conductor of electricity. Refer to table below for the Electrical properties ofMeitnerium
Electrical Conductivity | - |
Resistivity | - |
Superconducting Point | - |
Meitnerium Heat and Conduction Properties
Thermal Conductivity | - |
Thermal Expansion | - |
Meitnerium Magnetic Properties
Magnetic Type | - |
Curie Point | - |
Mass Magnetic Susceptibility | - |
Molar Magnetic Susceptibility | - |
Volume Magnetic Susceptibility | - |
Optical Properties of Meitnerium
Refractive Index | - |
Acoustic Properties of Meitnerium
Speed of Sound | - |
Meitnerium Thermal Properties - Enthalpies and thermodynamics
Refer to table below for Thermal properties of Meitnerium
Melting Point | - (-273.15°C, -459.66999999999996 °F) |
Boiling Point | - (-273.15°C, -459.66999999999996 °F) |
Critical Temperature | - |
Superconducting Point | - |
Enthalpies of Meitnerium
Heat of Fusion | - |
Heat of Vaporization | - |
Heat of Combustion | - |
Meitnerium Isotopes - Nuclear Properties of Meitnerium
Meitnerium has 15 isotopes, with between 265 and 279 nucleons. Meitnerium has 0 stable naturally occuring isotopes.
Isotopes of Meitnerium - Naturally occurring stable Isotopes: -.
Isotope | Z | N | Isotope Mass | % Abundance | T half | Decay Mode |
---|---|---|---|---|---|---|
265Mt | 109 | 156 | 265 | Synthetic | ||
266Mt | 109 | 157 | 266 | Synthetic | ||
267Mt | 109 | 158 | 267 | Synthetic | ||
268Mt | 109 | 159 | 268 | Synthetic | 30 m | AlphaEmission |
269Mt | 109 | 160 | 269 | Synthetic | ||
270Mt | 109 | 161 | 270 | Synthetic | ||
271Mt | 109 | 162 | 271 | Synthetic | ||
272Mt | 109 | 163 | 272 | Synthetic | ||
273Mt | 109 | 164 | 273 | Synthetic | ||
274Mt | 109 | 165 | 274 | Synthetic | ||
275Mt | 109 | 166 | 275 | Synthetic | ||
276Mt | 109 | 167 | 276 | Synthetic | ||
277Mt | 109 | 168 | 277 | Synthetic | ||
278Mt | 109 | 169 | 278 | Synthetic | ||
279Mt | 109 | 170 | 279 | Synthetic |
Regulatory and Health - Health and Safety Parameters and Guidelines
Database Search
List of unique identifiers to search the element in various chemical registry databases
Database | Identifier number |
---|---|
CAS Number - Chemical Abstracts Service (CAS) | CAS54038-01-6 |
RTECS Number | - |
CID Number | - |
Gmelin Number | - |
NSC Number | - |
Compare Meitnerium with other elements
Compare Meitnerium with all Group 9 elements
Compare Meitnerium with all Period 7 elements
Compare Meitnerium with all Transition Metal elements
FAQs
What is the electronic configuration of Meitnerium?
The electronic configuration of Meitnerium is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f14 6d7 7s2.
What is the abbreviated electronic configuration of Meitnerium?
The abbreviated electronic configuration of Meitnerium is [Rn] 5f14 6d7 7s2. To form abbreviated notation of electronic configuration, the completely filled subshells are replaced by the noble gas of the preceding period in square brackets.
What is the symbol of Meitnerium?
Symbol of Meitnerium is Mt. Meitnerium is a chemical element with symbol Mt and atomic number 109.
What is the position of Meitnerium in the Periodic Table?
Meitnerium is a chemical element with the symbol Mt and atomic number 109. Meitnerium is the 109 element on the periodic table. It is located in group 9 and period 7 in the modern periodic table.
What is the atomic number of Meitnerium?
The atomic number of Meitnerium is 109.
What is the color of Meitnerium?
Meitnerium is of color.
Who discovered Meitnerium?
The element Meitnerium was discovered by G. Münzenberg,P. Armbrusteret al.(GSI in Darmstadt) in year 1982 in Germany. Meitnerium was first isolated by undefined in undefined.
How many valence electrons does a Meitnerium atom have?
Meitnerium has null valence electrons. Meitnerium has 109 electrons out of which null valence electrons are present in the 6d7 7s2 outer orbitals of atom.
What is the melting Point of Meitnerium?
Melting Point of Meitnerium is null K.
What is the boiling Point of Meitnerium?
Boiling Point of Meitnerium is null K.
What is the melting Point of Meitnerium in Kelvin?
Melting Point of Meitnerium in Kelvin is null K.
What is the boiling Point of Meitnerium in Kelvin?
Boiling Point of Meitnerium in Kelvin is null K.
What is the electronic configuration of Meitnerium 109?
The electronic configuration of Meitnerium will be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f14 6d7 7s2.
How do you write the electron configuration for Meitnerium?
The electronic configuration of Meitnerium will be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f14 6d7 7s2.