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Polonium

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by

angel reynolds

on 24 August 2013

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Transcript of Polonium

Polonium
The history.
Polonium has no common compounds, and almost all of its compounds are synthetically created
it has no luster
potential hazards:
Polonium is highly dangerous and has no biological role.
The main hazard is its intense radioactivity (as an alpha emitter), which makes it very difficult to handle safely. Even in microgram amounts, handling Po is extremely dangerous.
Some anti-static brushes contain up to 500 microcuries (20 MBq) of 210Po as a source of charged particles for neutralizing static electricity
Sources
http://www.rsc.org/periodic-table/element/84/polonium
Because of its position in the periodic table, polonium is sometimes classified as a metalloid. However, other sources say that on the basis of its properties and behavior, it is "unambiguously a metal"
Polonium
By: angel reynolds
Polonium is a chemical element with the symbol
Po and atomic number 84, discovered in 1898 by
Maria Skłodowska-Curie and Pierre Curie.
A rare and highly radioactive element with no stable isotopes, polonium is chemically similar to bismuth and tellurium, and it occurs in uranium ores.
polonium is named after Marie Curie's home land of Poland
Polonium has an atomic mass of 209
electron configuration: [xe] 6s^2 4f^14 5d^10 6p^4
valance electrons: 6s^2 p^4
its color is a silver-gray
the texture of polonium is smooth like glass
it has the ability to conduct electricity at 0.029 10^6
its density is 9.3/cc @ 300k
polonium's state at room temperature is a solid
it is malleable and ductile


fun fact:
Poland at the time of Polonium's discovery
was under Russian, German,
and Austro-Hungarian partition, and did not
exist as an independent country. It was
Curie's hope that naming the element after
her native land would publicize its lack of
independence. Polonium may be the first
element named to highlight a political
controversy.
This element was the first one discovered by the Curies while they were investigating the cause of pitchblende radioactivity. The pitchblende, after removal of the radioactive elements uranium and thorium, was more radioactive than both the uranium and thorium put together. This spurred the Curies on to find additional radioactive elements. The Curies first separated out polonium from the pitchblende in July 1898, and five months later, also isolated radium.
its boiling point is 962 degrees Celsius
its melting point is 254 degrees Celsius
Alpha particles emitted by polonium will damage organic tissue easily if polonium is ingested, inhaled, or absorbed, although they do not penetrate the epidermis and hence are not hazardous as long as the alpha particles remain outside of the body.
common and
historical uses
Polonium is an alpha-emitter, and is used as an alpha-particle source for scientific research in the form of a thin film on a stainless steel disc. It is also used as a heat source in space equipment. It can be mixed or alloyed with beryllium to provide a source of neutrons.
http://en.wikipedia.org/wiki/Polonium#Commercial_products_containing_polonium
http://environmentalchemistry.com/yogi/periodic/Po.html
http://www.chemicool.com/elements/polonium.html
Used for nuclear batteries, neutron source, antistatic agents, film cleaner
Full transcript