Seaborgium Information
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Seaborgium Element
Seaborgium is a synthetic
chemical element with the symbol Sg and atomic number 106. It is named after
the American nuclear chemist Glenn T. Seaborg. As a synthetic element, it can
be created in a laboratory but is not found in nature. It is also radioactive;
the most stable known isotope, 269Sg, has a half-life of approximately 14
minutes.[5]
In the periodic table of the
elements, it is a d-block transactinide element. It is a member of the 7th
period and belongs to the group 6 elements as the fourth member of the 6d
series of transition metals. Chemistry experiments have confirmed that
seaborgium behaves as the heavier homologue to tungsten in group 6. The
chemical properties of seaborgium are characterized only partly, but they
compare well with the chemistry of the other group 6 elements.
In 1974, a few atoms of
seaborgium were produced in laboratories in the Soviet Union and in the United
States. The priority of the discovery and therefore the naming of the element
was disputed between Soviet and American scientists, and it was not until 1997
that International Union of Pure and Applied Chemistry (IUPAC) established
seaborgium as the official name for the element. It is one of only two elements
named after a living person at the time of naming, the other being oganesson,
element 118.
Seaborgium (Sg), an
artificially produced radioactive element in Group VIb of the periodic table,
atomic number 106. In June 1974, Georgy N. Flerov of the Joint Institute for
Nuclear Research at Dubna, Russia, U.S.S.R., announced that his team of
investigators had synthesized and identified element 106. In September of the
same year, a group of American researchers headed by Albert Ghiorso at the
Lawrence Radiation Laboratory (now Lawrence Berkeley Laboratory) of the
University of California at Berkeley reported their synthesis of the identical
element. Disagreement arose between the two groups over the results of their
experiments, both having used different procedures to achieve the synthesis.
The Soviet scientists had bombarded lead-207 and lead-208 with ions of
chromium-54 to produce an isotope of element 106 having a mass number of 259
and decaying with a half-life of approximately 0.007 second. The American
researchers, on the other hand, had bombarded a heavy radioactive target of
californium-249 with projectile beams of oxygen-18 ions, which resulted in the
creation of a different isotope of element 106—one with a mass number of 263
and a half-life of 0.9 second. Russian researchers at Dubna reported their
synthesis of two isotopes of the element in 1993, and a team of researchers at
Lawrence Berkeley duplicated the Ghiorso group’s original experiment that same
year. In honour of the American nuclear chemist Glenn T. Seaborg, American
researchers tentatively named the element seaborgium, which was later ratified
by the International Union of Pure and Applied Chemistry. Based on its position
in the periodic table, seaborgium is thought to have chemical properties akin
to those of tungsten.
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