Dubnium

Located in Group 5 and Period 7 of the Periodic Table is one of the Super - Heavy man - made element. This is Dubnium

Georgy Flerov

First discovered in 1968, by a team led by Georgy Flerov at the Russian Joint Institute for Nuclear Research (JINR). First created succesfully in 1970 by another team led by Albert Ghiorso at the American Lawrence Berkeley Laboratory (LBL), who bombarded Californium with Neon and obtained isotope Dubnium - 261.

Albert Ghiorso

In 1968, after the discovery of Rutherfordium, Georgy Flerov and team discovered Dubnium by bombarding Americium with Neon and made a new element, which after that became the element 105 in the Periodic Table

In 1970, after the discovery of Dubnium by the Russians, another rival of Georgy Flerov, the American's team led by Albert Ghiorso bombarded a Californium isotope with Neon isotopes. The Americans obtained a new Dubnium isotope at the American Lawrence Berkeley Laboratory (LBL) , which after that was called Dubnium - 261.

However, before the name of Dubnium was approved, both research teams argued the who should receive the discovery credit of Dubnium. So, because of that, both groups gave Dubnium different names. The Russians called it Nielsbohrium, while the Americans called it hahnium, both names still have the same meaning : which is all derived from the names of prominent nuclear.

IUPAC

Finally, after a few years of arguing about the name of Dubnium, in 1997, the International Union of Pure and Applied Chemistry (IUPAC) decided the new element should be called Dubnium.

Atomic Number : 105

Name : Dubnium

Latin Name : Dubnium

Electrons per shell : [ 2, 8, 18, 32, 32, 11, 2 ]

Discoverer : A scientist team led by Georgy Flerov ( 1968 )

Creator : A scientist team led by Albert Ghiorso ( 1970 )

Element's : Atomic Mass : 262 u ( estimated )

                  : Density : 29.3 g/cm³

                  : Type : Transition Metal 

Chemical Properties : 

Because Dubnium is one of the man - made heavy metal, as all of the man - made  element's characteristic has, Dubnium has a very short half life. So, not much was discovered about Dubnium. However, this is what we know :

• Reacts to hot acids
• Reacts with water, air and halogens ( Chlorine, Fluorine, Bromine, Iodine, Astatine and Tennessine are Halogens )

• 

  Dubnium Isotopes

  16 isotopes : 3 of them are :
      Dubnium - 266 : Protons : 105
                               : Electrons : 161
                               : Neutrons : 105
    ( Half Life : 22 minutes )
  
      Dubnium - 267 : Protons : 105
                               : Electrons : 162
                               : Neutrons : 105
    ( Half Life : 1 hour )
  
      Dubnium - 268 : Protons : 105
                               : Electrons : 163
                               : Neutrons : 105
    ( Half Life : 30 hours )

Physical Properties :

Once again, because of Dubnium's usual properties ( short half live ), not much information was obtained. However, this is what we know : 

• solid at room temperature ( predicted )
• highly radioactive!
• Melting Point and Boiling Point unknown

  

  Radioactive Hazard Symbol

How Dubnium got its name?

Dubnium got its name from its discovery country, Dubna, Russia. Which is where Georgy Flerov and team stays as well as the place where Dubnium and Ruthenium was discovered.

Georgy Flerov Monument

Uses

Dubnium has no known commercial uses... yet, because of its short half life. Dubnium only use is in Laboratory, where researches about Dubnium occur.

THIS IS THE END OF DUBNIUM
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