February 19
One atom of mendelevium (Md, element 101) was produced by Gregory R. Choppin, Glenn Seaborg, Bernard G. Harvey, and Albert Ghiorso in 1955 by bombarding a billion atoms of 253Es with helium.
Ferdinand Reich born 1799: codiscovered indium (In, element 49)
Birthdays of Nobel Prize Winners
Svante Arrhenius born 1859: electrolytic dissociation, viscosity, reaction rates, and even the greenhouse effect; Nobel prize, 1903
Roderick MacKinnon born 1956: structural and mechanistic studies of ion channels; Nobel Prize, 2003
Other Chemists
Gottlieb Sigismund Kirchhof born 1764: catalytically produced glucose from starch.
Louis-Georges Gouy born 1854: interfacial electrical double layer.
Ernest Marsden born 1889: scattering of alpha particles (work with Hans Geiger in Ernest Rutherford's lab), contributing to the development of the nuclear model of the atom. (Read 1909 and 1913 papers with Geiger.)
Wednesday, February 18, 2015
Voltaic Pile
Voltaic Pile
The Voltaic Pile may have been the first successful multi-cell battery. This video presents the history of this important device and explains how they are constructed. If you attempt to construct your own voltaic pile make sure you have adult supervision, someone with knowledge of electrical systems and safety procedures. Search the Internet for "voltaic pile" for more information about these devices.
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Science Online
http://electronics.howstuffworks.com/everyday-tech/battery4.htm
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