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Dubnium (Db) – Element 105 of the periodic table

Dubnium (symbol Db) is element number 105 of the periodic table and belongs to the “Transition metal” category. Its atomic mass is about 268, and its phase under standard conditions is Solid (a theoretical prediction). This element sits in period 7 and group 5 of the periodic table, and its electrons are arranged in shells of 2, 8, 18, 32, 32, 11, 2. The short electron configuration of Dubnium is [Rn] 5f¹⁴ 6d³ 7s². Known uses of Dubnium include Scientific research.

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Dubnium is a radioactive, mostly synthetic element; its data may be based on limited experiments or theoretical prediction.

Properties of Dubnium

Atomic number
105
Chemical symbol
Db
Atomic mass
268
Category
Transition metal
Period
7
Group
5
Phase
Solid (a theoretical prediction)
Protons
105
Electrons
105
Neutrons (approx.)
163
Electron shells
2, 8, 18, 32, 32, 11, 2
Outer-shell electrons
2
Discovered
Dubna Research Institute (1968)

Electron configuration of Dubnium

The electron configuration of Dubnium (Db), with 105 electrons, is shown below. The last shell (shell 7) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d³ 7s²
Short configuration
[Rn] 5f¹⁴ 6d³ 7s²
Last shell
7s²

This synthetic element’s electron configuration is a theoretical prediction.

What is electron configuration and how is it written?

Electron shells of Dubnium

Distribution of 105 electrons of Dubnium across shells K to Q:

  1. K2
  2. L8
  3. M18
  4. N32
  5. O32
  6. P11
  7. Q2

What is a transition metal?

The transition metals are the d-block elements: usually good conductors of heat and electricity, with several oxidation states, and they form colourful compounds and important catalysts.

Uses of Dubnium

Frequently asked questions about Dubnium

What is the atomic number of Dubnium?

The atomic number of Dubnium (Db) is 105; that is, every atom of it has 105 protons.

What is the electron configuration of Dubnium?

The electron configuration of Dubnium (Db) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d³ 7s²; in short form it is [Rn] 5f¹⁴ 6d³ 7s², and its last shell is 7s².

What is the chemical symbol of Dubnium?

The chemical symbol of Dubnium is Db.

Where is Dubnium located in the periodic table?

Dubnium is located in period 7 and group 5 and belongs to the “Transition metal” category.

What is the atomic mass of Dubnium?

The atomic mass of Dubnium is about 268 (atomic mass units).

What is the phase of Dubnium under normal conditions?

The phase of Dubnium under standard conditions is Solid (a theoretical prediction).

What are the uses of Dubnium?

Uses of Dubnium include Scientific research.

Who discovered Dubnium?

Dubnium was discovered by Dubna Research Institute in 1968.

Elements in the same category as Dubnium (Transition metal)

Palladium (Pd)Silver (Ag)Cadmium (Cd)Hafnium (Hf)Tantalum (Ta)Tungsten (W)Rhenium (Re)Osmium (Os)Iridium (Ir)Platinum (Pt)Gold (Au)Mercury (Hg)Rutherfordium (Rf)Seaborgium (Sg)Bohrium (Bh)Hassium (Hs)Meitnerium (Mt)Darmstadtium (Ds)Roentgenium (Rg)Copernicium (Cn)

See all Transition metals

Dubnium’s group 5 neighbours

Vanadium (V)Niobium (Nb)Tantalum (Ta)

Group 5 of the periodic table