Dubnium Chemical Properties (19 Facts You Should Know)

Dubnium is an artificial and transuranium element which is synthesized by the bombardment of electrons. Let us discuss its features and related facts as a transuranic element.

Dubnium’s presence on the earth is not natural due to which its research is limited. It is a body-centered cubic element whose behavior defies the periodic properties and the trends. Due to extreme sensitivity, this element is produced in small quantities.

Dubnium is an artificial element, so it does not have applications like main-group elements. Due to its small production and unavailability from the earth’s crust, its usages are confined to the nuclear research field only. Let us discuss facts related to this unique element like density, weight and various other periodic properties.

Dubnium symbol

Symbols were designated to ease the representation of an element according to their complex scientific names. Let us check the symbol designated to dubnium.

The symbol assigned to dubnium is Db.

dubnium chemical properties
Symbolic and 3D representation of dubnium

Dubnium group in the periodic table

Groups always represent the family of elements which, though different, have the same foundational properties. Let us find out the same for dubnium.

Dubnium belongs to group 5 of the periodic table which is designated as the vanadium family.

Dubnium period in the periodic table

The period is a row where there is a successive shift in the properties of elements with the occupation of valence shells. Let us find out the period of dubnium.

Dubnium is situated in the 7th and the last period of the periodic table.

Dubnium block in the periodic table

A block in the periodic table is classified according to the subshells filled. Let us evaluate it for dubnium.

Dubnium is present in the d-block (diffused) of the periodic table which implies that it is a transition metal.

Dubnium atomic number

The atomic number is the fundamental property of an element which is nuclear charge and is denoted by symbol Z. Let us discuss it for dubnium.

Atomic number (Z) of dubnium is 105.

Dubnium atomic weight

Atomic weight is the mass of an element that is fixated in the centre i.e. nucleus. Let us discuss it for dubnium.

The atomic weight of dubnium is 262 u.

Dubnium atomic density

Atomic density is the volumetric aspect of an atom according to its mass and the no. of atoms involved.

The predicted atomic density of dubnium is 21.6 g/cm3.

Dubnium isotopes

Isotopes have the same atomic number, but they differ in their mass numbers due to differences in the neutrons. Let us check no. of isotopes in dubnium.

Dubnium has a total of 7 recognized isotopes but the most common is 268Db which has a half-life of approximately 32 hours the shortest one and easily decays through spontaneous fission.

Dubnium electronic shells

The electronic shells represent a broader distribution of electrons according to energy levels. Let us find out the shells associated with dubnium.

There are 7 electronic shells in dubnium where the electrons are distributed according to the octet rule 2, 8, 18, 32, 32, 11, 2.

Dubnium energy of first ionization

First ionization energy describes the energy required for removing the 1st electron which depends on a lot of nuclear and electronic factors. Let us check it for dubnium.

The energy of the first ionization in dubnium is 664.8 KJ/mol. 

Dubnium energy of second ionization

Like the first one, it is the subsequent energy required for the removal of the 2nd electron. Let us check and compare it in the case of dubnium.

The energy of the second ionization in dubnium is 1546.7 KJ/mol which is quite higher than the first one.

Dubnium energy of third ionization

The third ionization energy is responsible for removing the third electron. Let us see the figures for the same in dubnium.

The third ionization energy in dubnium is 2378.4 KJ/mol which is the highest among the three due to various nuclear attraction factors.

Dubnium oxidation states

The oxidation state is the theoretical charge acquired by an element if it undergoes bonding. Let us analyze it for dubnium.

The oxidation state of dubnium is +5 which is per its electronic configuration as no evidence is available for the compounds related to it.

Dubnium electron configuration

Electron configuration signifies the distribution of electronics according to the azimuthal quantum number. Let us understand the electron configuration of dubnium. 

The electron configuration of dubnium is [Rn]5f146d37s2 where Rn is the noble gas Radon.

Dubnium CAS number

CAS number is a numeric representation of an element as decided by the Chemistry Abstract Service. Let us check it for dubnium.

The CAS number representing dubnium is 53850-35-4.

Dubnium allotropic forms

Allotropic forms are of the same element with the same chemical composition but different physical arrangements. Let us check whether it is observed in dubnium.

There are no allotropic forms for dubnium because it is still a young element in terms of research and production.

Dubnium Chemical classification

Chemical classification is an important aspect to understand the characteristics associated with the element and its future use. Let us study the same.

Various chemical properties and characteristics of dubnium are:

  • Dubnium is a transition metal element with a high amount of radioactivity, especially in nuclear fission reactions.
  • Dubnium is a d-block element but most of its properties are anomalous due to its synthetic nature and are seen breaking periodic trends.
  • Dubnium does not have any biological or chemical applications because it is stable for a very short period.
  • Computational studies of dubnium predicts the presence of covalent character in them if combined with non-metals for instance chlorine

Dubnium state at room temperature

The state of matter at room temperature is highly dependent on the crystal structure of an element. Let us find it out for dubnium at STP.

The state of matter at room temperature for dubnium is solid as it is a strong cubic-centered crystal structure and is artificially synthesized. 

Is Dubnium paramagnetic?

According to chemistry paramagnetism is the state where an atom has one or more unpaired electrons and is weakly magnetic. Let us access the magnetism in dubnium.

Dubnium is not paramagnetic in nature because of the uncertainty in the magnetism of radioactive and artificially synthesized elements.


In nutshell, Dubnium is an artificially prepared radioactive element which is very different from its other counterparts in terms of complexation, bonding, and electronic and periodic properties. Currently, it is applicable in the radioactive field only.