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On Saturday, March 11, the American Chemical
Society, the world's largest scientific society, designated the discovery
of transcurium elements at the U.S. Department of Energy's Lawrence
Berkeley National Laboratory (Berkeley Lab) as a "National Historic
Chemical Landmark." The designation represents the efforts of the ACS
to "recognize our scientific and technical heritage and encourage the
preservation of historically important achievements and artifacts in
chemistry, chemical engineering, and the chemical process
industries."
At a ceremony held at Berkeley Lab, ACS president Daryle Busch
presented Berkeley Lab director Charles Shank with an inscribed plaque
which read:
"Between 1949 and 1999, 14 new elements beyond element 96 (curium)
were discovered by teams of scientists working on 'The Hill' in what is
now the Lawrence Berkeley National Laboratory. These researchers developed
theories and techniques to synthesize and identify elements with
increasingly higher atomic numbers. Their efforts culminated in 1999 with
the synthesis of elements 118, 116, and 114, extending the Periodic Table
to a long-sought region of nuclear stability poetically dubbed The Island
of Superheavy Elements."
Said Busch in his presentation remarks, "Today we honor one of the
great institutions in the history of chemistry and the milestone
discoveries of new elements here. On behalf of the American Chemical
Society, we proudly designate the discovery of these transcurium elements
at the Lawrence Berkeley National Laboratory as a National Historic
Chemical Landmark."
Darleane Hoffman, a chemist in Berkeley Lab's Nuclear Science Division,
a codiscoverer of several of these elements and this year's recipient of
the Priestley Medal, the ACS' highest honor, served as master of
ceremonies for the event. Also on hand to discuss their own contributions
to this 50 year legacy of discovery were Albert Ghiorso who has
participated in more new element discoveries than anyone else in history,
Ken Gregorich, one of the codiscoverers of elements 118, 116, 114, and
110, and Carol Alonso, one of the codiscoverers of seaborgium, element
106, which was named for Glenn Seaborg, Nobel Laureate chemist and
discoverer of 10 atomic elements including plutonium. Seaborg died on
February 25, 1999 at the age of 86 but his memory was very much a part of
the ceremonies.
Said Busch, "The discovery of these elements advanced the
frontiers of science (and) also illustrates the impact on science both of
a great man and a great team. The great man is, of course, Glenn Seaborg.
It is fitting that Glenn Seaborg was the first living person honored by
having an element named after him."
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