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Ununpentium

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Ununpentium
Ununpentium
General Info
Atomic Symbol Atomic symbol::Uup
Atomic Number Atomic number::115
Atomic Weight Atomic weight::288 g/mol
Chemical series Poor metal
Appearance Unknown
Group, Period, Block 15, 7, p
Electron configuration [Rn] 5f14, 6d10, 7s2, 7p3
Electrons per shell 2, 8, 18, 32, 32, 18, 5
Electron shell ununpentium.png
CAS number CAS number::54085-64-2
Physical properties
Phase solid (predicted)
Density Density::13.5 g/ml
Melting point Melting point::670K
Boiling point Boiling point::~1400K
Isotopes of Ununpentium
iso NA half-life DT DE (MeV) DP
287Uup 287.19070(52)# 287172 {{{5}}} {{{6}}}
288Uup 288.19274(62)# 287173 {{{5}}} {{{6}}}
All properties are for STP unless otherwise stated.

Ununpentium is an extremely heavy chemical element with no known uses or properties. It was first synthesized in 2003 when in a particle collider where Calcium and Americium were fused together. It had a half-life of about one thousandth of a millisecond and could only be observed for a very short period of time. It created one Ununpentium 118 and three Ununpentium 117. Once it alpha decayed it ended up turning back into ununtrium, another extremely heavy element. Because of the small amount of knowledge known about this element it is currently not recognized as a "discovered" element but is on its way to becoming one.

Properties

There are no known properties of this element as of now, other than that it is an extremely heavy element that is thought to be a chemical element.[1]

Discovery

Laurence Livermore National Laboratory where ununpentium was discovered

In 2003, research scientists at the Joint Institute for Nuclear Research in Dubai, Russia and the Laurence Livermore National Laboratory in California believed that they had discovered the 115th element, Ununpentium. The work was a joint project between science teams led by Yuri Oganessian and Ken Moody. Ununpentium is a fuse of Calcium and Americium created by a fusion of element 20 (Calcium) and element 95 (Americium). To make this happen the Calcium was fired at a layer of aluminum with a layer of Americium which may have created four atoms of Ununpentium which ended up alpha decaying into ununtrium. The researchers believe that when this happened, one atom of ununpentium 288 was made and 3 atoms of ununpentium 287 were made.

After submitting this evidence to the IUPAC, they reviewed the evidence for several years and in 2011 deemed that they had insufficient evidence and that the element had not been officially discovered. They had this statement because that even though it was convincing, there just wasn't enough solid evidence to say that it had truly been discovered.[2]

Occurrences / Synthesis

Simulation of the collision of calcium-48 and amercium-243.

Ununpentium will not occur anywhere in the known universe other than a particle collider. The reason for this is that there is no other possible way for the elements used in the fission of this element to be done naturally. Because of the extreme heat and pressure something impossible would need to happen. When it does occur ,though, it is an extremely heavy element that is thought to be classified under the chemical section of the periodic table under bismuth but for now is in the classification of the unknown element section.

Ununpentium was synthesized by a process known as hot fusion. Hot fusion reactions are when high temperatures are used to make a compound nuclei, but because of the high excitation of the element there is a very low chance of the survival of fission, Fission is when a particle splits in two either by alpha decay or when instigated in a lab. This nuclei then proceeds to decay via the emission of 3–5 neutrons. The type of fusion that was used, uses 48-calcium (48Ca) which ends up producing compound nuclei with intermediate excitation energies (~30–35 MeV) and are sometimes referred to as "warm" fusion reactions and usually gives high chances of having a successful fusion.[3] [4]

Uses

Because Ununpentium is an element that has very few atoms that has been identified and only has a ][half-life]] of about a thousandth of a millisecond, there are no known uses of this element. Even though there are no known uses, it can still help scientists further the knowledge of the elements and of the periodic table. It could also be used as a study for the heavy elements and be used as a reference to all the other elements of its kind. [5]


Video

A video about the known facts of Ununpentium

References

  1. Unknown Author. [1] WebElements Periodic Table. Web. Accessed on October 21, 2013.
  2. Ununpentium Chemicool. Web. accessed on October 8, 2013. Unknown Author
  3. Author Unknown. [2] Ununpentium - Wikipedia. Web. Accessed on October 23, 2013.
  4. Author Unknown. [3] LiveScience. Web. Accessed on October 30, 2013.
  5. Winter,Mark. [4] WebElements Periodic Table on the Web. Web. accessed on October 9, 2013.