Group 9, by modern IUPAC numbering,[1] is a group (column) of chemical elements in the d-block of the periodic table. Members of Group 9 include cobalt (Co), rhodium (Rh), iridium (Ir) and meitnerium (Mt).[2][page needed] These elements are among the rarest of the transition metals.[3]
Like other groups, the members of this family show patterns in electron configuration, especially in the outermost shells, resulting in trends in chemical behavior; however, rhodium deviates from the pattern.
^Fluck, E. (1988). "New Notations in the Periodic Table" (PDF). Pure Appl. Chem.60 (3): 431–436. doi:10.1351/pac198860030431. S2CID 96704008. Retrieved 24 March 2012.
^Leigh, G. J. Nomenclature of Inorganic Chemistry: Recommendations 1990. Blackwell Science, 1990. ISBN 0-632-02494-1.
Group9, by modern IUPAC numbering, is a group (column) of chemical elements in the d-block of the periodic table. Members of Group9 include cobalt (Co)...
of the early transition metal groups, where the lightest element is distinct from the very similar next two. All the group 3 elements are rather soft, silvery-white...
which is group 18 (current IUPAC), the noble gases. In the older group naming systems, this group was combined with groups9 and 10 and called group "VIIIB"...
chemists then correctly assumed that it was the ore of a distinct new element, named molybdenum for the mineral in which it was discovered. Peter Jacob...
order. Silver is also the most thermally conductive element, and the most light reflecting element. Silver also has the unusual property that the tarnish...
three Group 5 elements occur naturally and share similar properties; all three are hard refractory metals under standard conditions. The fourth element, dubnium...
which each group suggesting its own name: the Dubna group named the element kurchatovium after Igor Kurchatov, while the Berkeley group named it rutherfordium...
naturally in ores, and it is the earth's 22nd most abundant element. Two prominent groups of ores from which it can be extracted are laterites and sulfide...
became the common name. The heaviest known group 12 element, copernicium, was first created on February 9, 1996, at the Gesellschaft für Schwerionenforschung...
resulting in trends in chemical behavior. This group has the defining characteristic whereby each component element has 5 electrons in their valence shell, that...
Sulfur has been known since antiquity, and oxygen was recognized as an element in the 18th century. Selenium, tellurium and polonium were discovered in...
fairly common element, whereas rhenium is rare, technetium only occurs in trace quantities, and bohrium is entirely synthetic. The trends in group 7 follow...
to have discovered element 85 in minerals, and called the element dakine, but he was also mistaken. An attempt at discovering element 85 in 1939 by Horia...
referred to as the triels. Several group 13 elements have biological roles in the ecosystem. Boron is a trace element in humans and is essential for some...
or uranium compounds. The seventh member of group 18 is oganesson (Og), an unstable synthetic element whose chemistry is still uncertain because only...
boiling points of the carbon group tend to get lower with the heavier elements. Carbon, the lightest carbon groupelement, sublimes at 3825 °C. Silicon's...
that every other element of the group may be obtained by repeatedly applying the group operation to g or its inverse. Each element can be written as...
synthetic chemical element; it has symbol Mt and atomic number 109. It is an extremely radioactive synthetic element (an element not found in nature...
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Extended periodic table Element 119 (Uue, marked here) in period 8 (row 8) marks the start of theorisations. An extended periodic table theorizes about...
been conducted to attempt the synthesis of element 119, which is likely to be the next member of the group; none were successful. However, ununennium...
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generating set of a group is a subset of the group set such that every element of the group can be expressed as a combination (under the group operation) of...
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