Bohrium (Bh) Carol At Mill Valley Middle School Ms. Eagle's Class Black
"Metallic and Bright, Bohrium is out of Sight"
History Niels Henrik David Bohr Transition Metals Isolation General Information Bibliography Glossary
History Bohrium was discovered in 1981 by Peter Armbruster, Gotfried Munzenbur and their coworkers. Bohrium was discovered in Germany at GSI where the name Nielsbohrium was proposed. This was cast out because no element before had incorporated the first name of a person before. This concerned the scientists and the name Bohrium was confirmed.
Transition Metals Bohrium is a transition metal along with all the elements through group 3 to group 12. Like metals, transition metals are both malleable, ductile and conduct electricity and heat. Something that sets transition metals apart from all other substances is that their valence electrons are in the two outermost shells. This makes it possible for them to have several oxidation states. Iron, nickel, and cobalt are the transition metals and are the only metals known to produce a magnetic field.
		Isolation Isolation an observable ammout of Bohrium has never been done. The reason for this is that Bohrium decays so quickly through the emission of a-particles. Very few atoms of Bohrium have ever been made. The first atoms were made through nuclear reaction involving fusion of an isotope of lead with one chromium.
Niels Henrik David Bohr Niels Henrik David Bohr was born on October 7, 1885 into a scientific family. His father, Christian Bohr, was a professor of physiology and won a doctorate in physiology. His mother, Ellen Adler, encouraged Niels to succeed in his studies. Harold Bohr was Niels Bohr's younger brother and closest friend and companion. Harold became a famous mathematician. Niels and his siblings grew up in a cultured and stimulating house hold. They were often exposed to knew ideas and conflicting views. In this aspect they soon developed a respect for all who seek a deeper understanding and knowledge. Niels Bohr had a strong bond towards his father and it was Harold who was the biggest inspiration to be a physicist and mathematician. "My interesting the study of physics was awakened while I was still in school, largely owing to the influence of my father." Niels was well known for his investigations of atomic structure and work on radiation. Niels Bohr won a Nobel Prize in Physics in 1922. He was elected fellow of Royal Society in 1926 and later accumulated the Royal Society Copley Medal in 1938. At an award society someone once described Bohr by saying, "For his services in the investigation of the structure of atoms and of the radiation emanating from them." Bohr also was very grateful to be able to work with Rutherford and when attending his funeral he said, "When I first had the privilege of working under his personal inspiration he was already a physicist of the greatest renown, but nevertheless he was then, and always remained, open to listen to what a young man had on his mind. . . The thought of him will always be to us and invaluable source of encouragement and fortitude.
General Information Other Names: Unnilseptium (Uns), Nielsbohrium (Ns) Atomic weight: 261.12 Atomic number: 107 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 18 Fourth Energy Level: 32 Fifth Energy Level: 32 Sixth Energy Level: 13 Seventh Energy Level: 2
Glossary *physiology- *doctorate- The degree or status of a docter as conferred by university *atomic structure *radiation *emanating- To flow out *isolation *reactivity *energy level *malleable *ductile- Easily drawn into wire or hammered thin *oxidation *cobalt
Bibliography 1) Niels Henrik David Bohr 2) Bohrium 3) Niels Bohr 4) Bohrium Elements 5) Periodic Table: Bohrium