Roentgenium

Physical properties

Not much is known about element 111, but it is assumed that it is a solid metal that hassome of the properties of its homologues, gold and silver, located just above it in group 1 (IB)in the periodic table. The reaction that produces unununium is as follows:
Bi-209 + Ni-64 + neutrons = Uuu-272 + alpha decay particles.
Only a few atoms of Rg-272 have been produced. Its most stable isotope is Rg-280, with ahalf-life of 3.6 seconds.

Isotopes

There are three isotopes of Uuu (R?entgenium). They are Rg-272 (half-life of1.5 milliseconds), Rg-279 (half-life of 170 milliseconds), and Rg 280 (half-life of 3.2seconds), the latter of which is r?entgenium’s most stable isotope. All of its isotopes aresynthetic and unstable.

Origin of Name

Named in honor of the scientist Wilhelm Konrad R?entgen.

History

On December 20, 1994, scientists at GSI Darmstadt, Germany announced they had detected three atoms of a new element with 111 protons and 161 neutrons. This element was made by bombarding ⁸³Bi with ²⁸Ni. Signals of Element 111 appeared for less than 0.002 s, then decayed into lighter elements including Element ²⁶⁸109 and Element ²⁶⁴107. These isotopes had not previously been observed. In 2004 IUPAC approved the name roentgenium for Element 111. Roentgenium is expected to have properties similar to gold.

Uses

None, except for research purposes.

Definition

roentgenium: Symbol Rg. A radioactivetransactinide; a.n. 111. It wasmade by fusion of ²⁰⁹Bi with ⁶⁴Ni.Only a few atoms have been detected.

Definition

A radioactive element produced synthetically. It is named for Wilhelm Roentgen Symbol: Rg; p.n. 111.

Hazard

Unununium (r?entgenium) is not a public radiation hazard given that only a few atomshave been produced synthetically in nuclear laboratories and they do not exist over long periodsof time.

Raw materials

Preparation Products