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In the periodic table of the elements, each column is a group. 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.
Elements of the group have one s-electron in the outer electron shell. Hydrogen is not considered to be an alkali metal as it is not a metal, though it is more analogous to them than any other group. This makes the group somewhat exceptional. b The 14 f-block groups (columns) do not have a group number.
English: This pictorial periodic table is colorful, boring, and packed with information. In addition to the element's name, symbol, and atomic number, each element box has a drawing of one of the element's main human uses or natural occurrences. The table is color-coded to show the chemical groupings.
The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups"). It is an icon of chemistry and is widely used in physics and other sciences.
Caveat emptor: These options we build to support the (wiki and RL) group-3 discussion. It has been settled based in the Provisional Report (Jan 2021). [1] The variants here are kept, but may be less thoroughly maintained. July 2021; Bare template pages (see also Periodic_table_(micro), the editor-friendly template).
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Download as PDF; Printable version; ... In the periodic table, a group is defined as a column. A single group can have multiple names.
IUPAC had previously supported this format of group 3 in a 1988 report as well, and it shows that when displaying 32-column tables (then ambiguity is impossible). Three formats of group 3 are common: one has Lu and Lr below Y (like the 1988 and 2021 IUPAC reports), one has La and Ac under Y, and one has blank spaces under Y.