Element Information, Facts, Properties, Trends, Uses, Comparison with other elements
Dubnium is a chemical element with symbol Db and atomic number 105. It is named after the town of Dubna in Russia (north of Moscow), where it was first produced. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, dubnium-268, has a half-life of approximately 28 hours.
It belongs to group 5 of the periodic table having trivial name .
Read key information and facts about element Dubnium
|Group in Periodic Table||5|
|Group Name||vanadium family|
|Period in Periodic Table||period 7|
|Block in Periodic Table||d -block|
|Electronic Configuration||[Rn] 5f14 6d3 7s2|
|Electronic Shell Structure (Electrons per shell)||2, 8, 18, 32, 32, 11, 2|
How to Locate Dubnium 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 105 to find Dubnium 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 Dubnium on periodic table look for cross section of group 5 and period 7 in the modern periodic table.
The element Dubnium was discovered by A. Ghiorso, M. Nurmia, K. Eskola, J. Harris and P. Eskola in year 1970 in Russia and United States. Dubnium was first isolated by in . Dubnium derived its name from Dubna, Russia.
Prepared by bombardment of californium with nitrogen atoms.
Dubnium Presence: Abundance in Nature and Around Us
The table below shows the abundance of Dubnium 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 Dubnium
The solid state structure of Dubnium is Body 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)
and the angles between them Lattice Angles (alpha, beta and 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||-|
|Oxidation States||Space Group Number||-|
|Crystal Structure||Body Centered Cubic|
Dubnium Atomic and Orbital Properties
Dubnium atoms have 105 electrons and the electronic shell structure is [2, 8, 18, 32, 32, 11, 2] with Atomic Term Symbol (Quantum Numbers) 4F3/2.
|Number of Electrons (with no charge)||105|
|Number of Protons||105|
|Number of Neutrons||157|
|Shell structure (Electrons per energy level)||2, 8, 18, 32, 32, 11, 2|
|Electron Configuration||[Rn] 5f14 6d3 7s2|
|Valence Electrons||6d3 7s2|
|Main Oxidation States||5|
|Atomic Term Symbol (Quantum Numbers)||4F3/2|
Bohr Atomic Model of Dubnium - Electrons per energy level
Ground State Electronic Configuration of Dubnium - neutral Dubnium atom
Abbreviated electronic configuration of Dubnium
The ground state abbreviated electronic configuration of Neutral Dubnium atom is [Rn] 5f14 6d3 7s2. The portion of Dubnium 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 6d3 7s2, electrons in the outermost shell that determine the chemical properties of the element.
Unabbreviated electronic configuration of neutral Dubnium
Complete ground state electronic configuration for the Dubnium atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f14 6d3 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 Dubnium
Dubnium atomic radius is - , while it's covalent radius is - .
|Atomic Radius Calculated|
- (0 Å)
|Atomic Radius Empirical|
- (0 Å)
|Van der Waals Radius||-|
|Neutron Cross Section||-|
|Neutron Mass Absorption||-|
Atomic Spectrum of Dubnium
Dubnium Chemical Properties: Dubnium Ionization Energies and electron affinity
The electron affinity of Dubnium is - .
Ionization Energy of Dubnium
Refer to table below for Ionization energies of Dubnium
|Ionization energy number||Enthalpy - kJ/mol|
Dubnium Physical Properties
Refer to below table for Dubnium Physical Properties
Hardness of Dubnium - Tests to Measure of Hardness of Element
Dubnium Electrical Properties
Dubnium is Conductor of electricity. Refer to table below for the Electrical properties ofDubnium
Dubnium Heat and Conduction Properties
Dubnium Magnetic Properties
|Mass Magnetic Susceptibility||-|
|Molar Magnetic Susceptibility||-|
|Volume Magnetic Susceptibility||-|
Optical Properties of Dubnium
Acoustic Properties of Dubnium
|Speed of Sound||-|
Dubnium Thermal Properties - Enthalpies and thermodynamics
Refer to table below for Thermal properties of Dubnium
|Melting Point||- (-273.15°C, -459.66999999999996 °F)|
|Boiling Point||- (-273.15°C, -459.66999999999996 °F)|
Enthalpies of Dubnium
|Heat of Fusion||-|
|Heat of Vaporization||-|
|Heat of Combustion||-|
Dubnium Isotopes - Nuclear Properties of Dubnium
Dubnium has 16 isotopes, with between 255 and 270 nucleons. Dubnium has 0 stable naturally occuring isotopes.
Isotopes of Dubnium - Naturally occurring stable Isotopes: -.
|Isotope||Z||N||Isotope Mass||% Abundance||T half||Decay Mode|