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 (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 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.)

Mar 8, 2024 · 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.

What is Dubnium. Dubnium (pronounced as DUB-nee-em) belongs to the family of transition metals and denoted by the chemical symbol Db. It has 12 isotopes out of which the most stable one is dubnium-268 with a half-life of 32 hours [1, 2, 3].

Jul 25, 2019 · Dubnium is a man-made element that was first created in Russia and later in the USA. Dubnium does not occur naturally and can only be produced in a nuclear lab. Dubnium is a radioactive element with the most stable isotope having a half-life of 28 hours.

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.

Dubnium is a transactinide or super-heavy element. It is a radioactive synthetic metal and has only been produced in tiny amounts. Dubnium is of research interest only. Abundance earth’s crust: nil. Abundance solar system: parts per billion by weight, parts per trillion by moles. Cost, pure: $ per 100g. Cost, bulk: $ per 100g.

Jan 21, 2025 · What is Dubnium? Dubnium (Db) is a synthetic chemical element with the atomic number 105. It is a highly radioactive element that does not occur naturally and is created in the laboratory through nuclear reactions.

Oct 21, 2013 · Dubnium is a synthetic element about which little is known. It is presumed to be a solid metal. [See Periodic Table of the Elements] Dubnium has seven recognized isotopes. The most stable is 268...