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Group 12, by modern IUPAC numbering, [1] is a group of chemical elements in the periodic table. It includes zinc (Zn), cadmium (Cd), mercury (Hg), [2] [3] [4] and copernicium (Cn). [5] . Formerly this group was named IIB (pronounced as "group two B", as the "II" is a Roman numeral) by CAS and old IUPAC system. [note 1]
- Periodic table - Wikipedia
The Roman numerals used correspond to the last digit of...
- Group 12 element - Simple English Wikipedia, the free encyclopedia
A group 12 element is a group in the periodic table of...
- Periodic table - Wikipedia
In chemistry, a group (also known as a family) [1] is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the 14 f-block columns, between groups 2 and 3, are not numbered.
Group 12 elements are often considered to be transition metals; however, zinc (Zn), cadmium (Cd), and mercury (Hg) share some properties of both groups, and some scientists believe they should be included in the main group.
There are eight main groups of elements, numbered 1, 2, and 13-18. The other ten groups are transition metals: Group 1: the alkali metals ( lithium family) *not including hydrogen. Group 2: the alkaline earth metals ( beryllium family) Groups 3-12: the transition metals. Group 13: the triels ( boron family)
The Group 12 elements mainly occur in sulfide ores, however, as with their Group 2 analogs, carbonate are known, but not as economically viable. The major zinc containing ore is zinc blende (also known as sphalerite), which is zinc sulfide (ZnS).
