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a Group 1 is composed of hydrogen (H) and the alkali metals. 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.
Download as PDF; Printable version; In other projects ... Period. 1. Hydrogen 1 H 1. ... Template:Periodic table legend ...
See also: Electronegativities of the elements (data page) There are no reliable sources for Pm, Eu and Yb other than the range of 1.1–1.2; see Pauling, Linus (1960).
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.
FA: current Featured Picture used in the infobox: A: current infobox picture is of high quality (could become FP) B: current infobox picture is of good quality
Template:Periodic table (metal abundance in Earth crust) Template:Periodic table (metalloid) Template:Periodic table (micro) Template:Periodic table (micro)/sandbox; Template:Periodic table (period 3) Template:Periodic table (persistent carbene) Template:Periodic table (Reihen and periods) Template:Periodic table (simple substance bonding)
<noinclude>[[Category:Periodic table group templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character. This category is not shown on its member pages unless the appropriate user preference (appearance → show hidden categories) is set.
There are currently seven complete periods in the periodic table, comprising the 118 known elements. Any new elements will be placed into an eighth period; see extended periodic table. The elements are colour-coded below by their block: red for the s-block, yellow for the p-block, blue for the d-block, and green for the f-block.
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