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Chemistry


Dubnium

Name: Dubnium
Symbol: Db
Number of Energy Levels: 7
Electrons on the outer energy level: 2
Atomic number: 105
Atomic Mass: 268 Amu (Atomic Mass Units)
Protons/Electrons: 105
Neutrons: 157
Density: 29.3 g/cm3
Classification: Transition Metal

Dubnium | Chemical elements

Dubnium was discovered in 1968 at Joint Institute for Nuclear Research. Dubnium was named after Dubna, a town in Russia. Dubnium’s melting and boiling points are unknown.

Top 8 interesting facts about Dubnium

  1. Dubnium is a synthetic element and it can’t be found in nature.
  2. Dubnium was first produced in Russia.
  3. Dubnium is a radioactive element.
  4. Dubnium-268 is the most stable isotope of dubnium with a half-life of 28 hours.
  5. Dubnium’s chemical properties are similar to the other elements of group 5.
  6. Dubnium is used for research purposes only.
  7. Dubnium was known in the past as hahnium (by Americans and western scientists) or nielsbohrium (by Soviet Union and Eastern Europe).
  8. Dubnium’s temporary name was unnilpentium until 1997 when the current name was adopted.

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