Dubnium is a synthetic chemical element; it has symbol Db and atomic number 105. It is highly radioactive: the most stable known isotope, dubnium-268, has a half-life of about 16 hours. This greatly limits extended research on the element. Dubnium does not occur naturally on Earth and is produced artificially.

Where the element is most commonly found in nature, and how it is sourced commercially. The image features a stylised Cyrillic character version of ‘Dubna’, the Russian town after which the element is named. It is set against an abstracted ‘fractal particle’ background. A highly radioactive metal, of which only a few atoms have ever been made.

Source: Dubnium is a synthetic radioactive metal, created by nuclear bombardment, and has only been produced in tiny amounts. Dubnium is made by bombarding californium-249 with nitrogen. It can also be produced by bombarding americium-243 with neon. Isotopes: Dubnium has 12 isotopes whose half-lives are known, with mass numbers from 256 to 270 ...

2024年3月8日 · Dubnium is a synthetic transition metal with an atomic number of 105 and is represented by the symbol ‘Db’ in the periodic table. It is silvery in appearance and belongs to the d-block of period 7 of the periodic table. Dubnium was the second transactinide (super-heavy) element to be identified.

Dubnium is a chemical element with symbol Db and atomic number 105. Classified as a transition metal, Dubnium is a solid at room temperature. 6.8 ± 0.5 eV (Theoretical value.)

Dubnium (Db), an artificially produced radioactive transuranium element in Group Vb of the periodic table, atomic number 105. The discovery of dubnium (element 105), like that of rutherfordium (element 104), has been a matter of dispute between Soviet and …

Dubnium is a transition metal that belongs to the 6d series, group 5 of the periodic table. It is placed under niobium, vanadium and tantalum and is predicted to have similarity with these elements, especially niobium.

This great seal of the City of Dubna, Russia appears in my Photographic Periodic Table Poster representing dubnium, which was discovered there and is named after the city. This highly unstable element can't reasonably be photographed, and a picture of its namesake seemed like a reasonable alternative.

Dubnium is a synthetic radioactive metal, created by nuclear bombardment, and has only been produced in tiny amounts. Dubnium is made by bombarding californium-249 with nitrogen. It can also be produced by bombarding americium-243 with neon. Dubnium has 8 isotopes whose half-lives are known, with mass numbers from 255 to 263. None are stable.

Element Dubnium (Db), Group 5, Atomic Number 105, d-block, Mass 268. Appearance, Discovery, Physical & Chemical Properties, Safety Data.