Periodic table / Dubnium

Overview

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.

Electron configuration

The electron configuration of Dubnium is *[Rn] 5f14 6d3 7s2, with electron shells of 2, 8, 18, 32, 32, 11, 2.

Physical and chemical properties

Dubnium is classified as a transition metal. It has an atomic mass of 268 and exists as a solid at standard conditions.

Real-world uses of Dubnium

As a transition metal, Dubnium is typically used in alloys, industrial manufacturing, electronics, or as a catalyst in chemical reactions.

Interesting facts about Dubnium

• Dubnium has the atomic number 105 and chemical symbol Db.
• It belongs to period 7, group 5 of the periodic table.
• Dubnium was discovered by Joint Institute for Nuclear Research.

Explore Dubnium interactively

Want to compare Dubnium with other elements or see it highlighted on the full table? Open the interactive periodic table and click on Db to explore properties, trends, and neighboring elements. You can also test your knowledge with our periodic table quiz game.