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Dubnium, including Technical Data, Safety Data and its high purity propertiesresearch, applications and other useful facts are discussed below. Scientific facts such as the atomic structure,ionization energyabundance on Earthconductivity and thermal properties are included.

Dubnium’s appearance is unknown but it is thought to be silvery, white or metallic gray. Little is known about the element and it has no known uses. Dudnium is a synthetic element and therefore is not naturally found in the environment.

Dubnium is a D-Block, Group 5, Period 7 element. The number of electrons in each of Dubnium‘s shells is 2, 8, 18, 32, 32, 11, 2 and its electronic configuration is [Rn] 5f14 6d3 7s2. In its elemental form Dubnium‘s CAS number 53850-35-4. 

The discovery of Dubnium was made independently by Russian researchers in 1967  and  then by American researchers in 1970.

Abundance. The following table shows the abundance of Dubnium and each of its naturally occurringisotopes on Earth along with the atomic mass for each isotope.
Isotope Atomic Mass % Abundance on Earth
Db-255 255.1074 -
Db-256 256.1081 -
Db-257 257.1079 -
Db-258 258.1093 -
Db-259 259.1097 -
Db-260 260.1114 -
Db-261 261.1121 -
Db-262 262.11376 (16) -
Db-263 263.1153 -

The following table shows the abundance of Dubnium present in the human body and in the universe scaled to parts per billion (ppb) by weight and by atom:

  Typical Human Body Universe
by Weight - 0
by Atom - -

Ionization Energy. The ionization energy for Dubnium (the least required energy to release a single electron from the atom in it‘s ground state in the gas phase) is stated in the following table:
1st Ionization Energy kJ mol-1
2nd Ionization Energy kJ mol-1

Conductivity. No data. 

Thermal Properties. The melting point and boiling point for Dubnium are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization.
Heat of Fusion No data
Heat of Vaporization No data
Heat of Atomization No data

Formula Atomic Number Molecular Weight Electronegativity (Pauling) Density Melting Point Boiling Point Vanderwaals radius Ionic radius Energy of first ionization
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