Glenn T. Seaborg as an exemplary chemical educator

January 7, 2018 | Author: Anonymous | Category: Science, Chemistry
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Glenn T. Seaborg as an Exemplary Chemical Educator Lester R. Morss American Chemical Society 244th National Meeting Philadelphia August 19, 2012

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Periodic Table, 1898

From W. Ostwald, Grundriss der Allgemeine Chemie, 1898

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History of Actinide Elements • Uranium: discovered by Klaproth, 1789 • Thorium: discovered by Berzelius, 1829 • Actinium: what is now known to be 227Ac was discovered by Debierne (1900) or Giesel (1902) • Protactinium: what is now known to be 234mPa was discovered by Fajans and Göring as “brevium”, 1913 • Enrico Fermi received Nobel Prize in 1938 for “transuranium elements” that were soon found to be fission products • Neptunium: 239Np discovered by McMillan and Abelson, 1940 • Plutonium: 238Pu discovered by Seaborg et al., 1940-1941 • Americium: 241Am discovered by Seaborg et al., 1944-1945 • Curium: 242Cm discovered by Seaborg et al., 1944 • Actinide hypothesis (filling the 5f subshell): Seaborg, 1944; announced 1945 3

GTS in Berkeley, 1941

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GTS with Periodic Table and Ion Exchange Column, May 1950

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Production of transplutonium elements by slow-neutron irradiation

Nuclear reaction sequence for production of transplutonium elements by intense slow-neutron irradiation. The principal path is shown by heavy arrows (horizontal, neutron capture; vertical, beta decay). The sequence above 258Fm is a prediction. 6

Periodic Table, 1951

http://imglib.lbl.gov/ImgLib/COLLECTIONS/BERKELEYLAB/SEABORG-ARCHIVE/images/96703289.lowres.jpeg 7

Academic Career of Glenn T. Seaborg • AB Chemistry, UCLA 1934 • PhD UC Berkeley with Gibson 1937 – Thesis: The Interaction of Fast Neutrons with Lead

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Research assistant for G. N. Lewis, 1937-39 Instructor, 1939-40 Assistant professor, 1940Section leader, Manhattan Project 1942-6 Professor, 1946-1999 Chancellor 8

What defines a chemical educator? • • • •

Classroom teaching Education of graduate students Curricular innovations Service on advisory panels that improve education • Mentoring junior colleagues • Leadership in professional organizations • Textbooks and monographs

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Seaborg as chemical educator • Chaired a panel of President Eisenhower's Science Advisory Committee to study the integration of basic research with graduate science education, 1958 – The “Seaborg Report” provided blueprint for American basic research for the next 25 years

• Chair, Chemical Education Material Study (CHEM Study), 1960 – Developed new teaching materials for high school chemistry

• • • •

President, American Association for the Advancement of Science, 1972 President, American Chemical Society, 1976 Director, Lawrence Hall of Science, 1982-1984 Co-chair with Secretary of Energy James D. Watkins at a summit conference on pre-college science and math education, 1989. – Report issued on May 22, 1990

• Appointed by California Governor Pete Wilson as Chairman of the Science Committee of the California Commission for the Establishment of Academic Content and Performance Standards, 1998.

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Announcement of discovery of Am and Cm

Glenn T. Seaborg and Quiz Kids Sheila Conlon and Bob Burke when Seaborg informally announces the discovery of element 95 (americium) and element 96 (curium) in Chicago on the radio show “Quiz Kids” on Nov 11, 1945. LBNL photo XBD9611-05600.TIF

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Anecdotal evidence • Katz, “Early Days in the ‘Met Lab’ ” paper in Transuranium Elements: A Half Century, 1990 • William Jolly, From Retorts to Lasers, 1987 • Patrick Coffey, Cathedrals of Science, 2008 • Ken Moody • Lester Morss

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Lester Morss • AB Chemistry and Physics, Harvard, 1961 • PhD UC Berkeley with B B Cunningham, 1969 – Thesis: Crystallography and Thermochemistry of Chlorocomplex Compounds of Lanthanides and Actinides

• Postdoctoral, J. W. Cobble, Purdue, 1969-71 • Assistant and associate professor, Rutgers University, 1971-80 • Chemist and senior chemist, Argonne, 19802002 • Program manager, DOE Office of Basic Energy Sciences, 2002-1010 13

• C&E News cover January 8, 1968

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Cunningham in Berkeley laboratory, 1956

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Morss, Cunningham, Seaborg, and Katz • Morss met Seaborg during AEC chair’s Berkeley visit ~1968 • Cunningham died March 28, 1971 – Seaborg writes to Morss, offering to be surrogate mentor

• Seaborg invited Morss to author chapter in The Chemistry of the Actinide Elements, 2nd ed. – Submits chapter 1978

• Morss met Katz at Argonne 1980 – – – –

Became third editor of The Chemistry of the Actinide Elements, 2nd ed. Mentored by Katz in editing many chapters Frequent meetings with Katz and Seaborg at ACS meetings 2nd edition of The Chemistry of the Actinide Elements published 1986

• Plans for 3rd edition of The Chemistry of the Actinide Elements through August 1998

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Katz publications with Seaborg • G. T. Seaborg, J. J. Katz, and W. M. Manning, (eds.) (1949) The Transuranium Elements: Research Papers, Natl. Nucl. En. Ser., Div. IV, 14B, McGraw‐Hill. • Glenn T. Seaborg and Joseph J. Katz (eds.), The Actinide Elements, McGraw-Hill, 1954.

• Joseph J. Katz and Glenn T. Seaborg, The Chemistry of the Actinide Elements, Methuen, 1957. • Joseph J. Katz, Glenn T. Seaborg, and Lester R. Morss (eds.), The Chemistry of the Actinide Elements, 2nd ed., 2 vols., Chapman & Hall, 1986. – 3rd and 4th editions: Morss, Fuger, Edelstein (eds.) The Chemistry of the Actinide and Transactinide Elements, 2006 (5 vols) and 2010 (6 vols)

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Dedication of The Chemistry of the Actinide Elements, 3rd ed.

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Seaborg, “Prospects for Further Extension of the Periodic Table,” J. Chem. Ed. 46, 626 (1969)

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Table of Isotopes: Island of Stability

The Chemistry of the Actinide and Transactinide Elememts (2006) Fig. 14.24. Plot of heavy element topology showing landing points for proposed reactions. Heavy element isotopes reported since 1978 up to mid‐2002 are indicated with symbols denoting half‐life ranges: 0.1 ms to 0.1 s (+); 0.1 s to 5 min (○); > 5 min (). 21

Chart of nuclides above berkelium (Z = 97), July 2012

E M Ramirez et al. Science, July 2012: science.1225636. fig 1

Published by AAAS

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Glenn Seaborg with CSEE students at LBNL Bldg 50

CSEE: Center for Science and Engineering Education at LBNL 23

Professor Burris Bell Cunningham

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Cunningham’s Salvioni balance

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First weighed sample of PuO2: 2.77 μg, Sept 10, 1942

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http://www.seaborg.ucla.edu/biography.html 27

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