History a Who discovered Bohrium b In 1976

History a) Who discovered Bohrium? b) In 1976 a Soviet scientist announced that he had synthesized element 107 (Bohrium), by bombarding 204 Bi with the heavy nuclei of 54 Cr. The existence of element 107 was confirmed by a team of West German physicist at the Heavy Ion Research Laboratory at Darmstadt, who created and identified six nuclei of element 107.

History b) Where did Bohrium’s name come from? Bohrium’s name comes from the scientist who discovered it, Niels Bohrium was originally known as Nielsbohrium, until its name was later shortened.

Uses a) Where is it found (in nature)? b) Bohrium is not found in nature because it is synthesized. c) Bohrium may only be created by bombarding a rapidly rotating cylinder, coated with a thin layer of bismuth metal, with a stream of 54 Cr ions fired tangentially.

Uses b) What is it used for? Bohrium has no current uses. It was merely discovered in mankind’s never-ending quest to learn more.

Three Interesting Facts About Bohrium 1) Bohrium has been known by three different names. 2) Through experiments, Bohrium was merely “glimpsed” by scientists for a mere 2/1000 of a second. 3) Much is unknown about Bohrium, including its Melting point, Boiling point, Crystal Structure, Density and Color.

Pictures Niels Bohr

Pictures Bohrium

Pictures Electron arrangement

History • a) Meitnerium was discovered by an Austrian physsicist named Lise Meitner. • b) Lise Meitner named his discovery after himself.

Uses • a) Meitnerium is not found at all in nature. It is a synthetic element. • b) Meitnerium has no current uses.

Three Interesting Facts • 1) Meitnerium was first synthesized on August 29, 1982. • 2) The element was created by bombarding a target of Bismuth-209 with accelerated nuclei of iron-58. • 3) The creation of Meitnerium demonstrated that nuclear fusion techniques could be used to make new, heavy nuclei.

Pictures

Pictures Electron Arrangement

Sources • Bentor, Yinon. Chemical Element. com – Meitnerium. Jan. 24, 2007. http: //www. chemicalelements. com/elements /mt. html • Bentor, Yinon. Chemical Element. com Bohrium. Jan. 24, 2007 < http: //www. chemicalelements. com/elements /bh. html>.

Credits Joseph Kinney Tamara Bowles