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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.
The table is color-coded to show the chemical groupings. Small symbols pack in additional information: solid/liquid/gas, the color of an element, common in the human body, common in the earth's crust, magnetic metals, noble metals, radioactive, and rare or never found in nature.
Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18; Hydrogen & alkali metals Alkaline earth metals Triels Tetrels Pnictogens Chalcogens Halogens Noble gases
Category: Alkali metals. ... Download as PDF; Printable version; In other projects Wikimedia Commons; ... Group 1 element; L. List of alkali metal oxides;
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
Boron is a special case, being the only nonmetal in group 13. The alkali metal borides tend to be boron-rich, involving appreciable boron–boron bonding involving deltahedral structures, [10]: 147–8 and are thermally unstable due to the alkali metals having a very high vapour pressure at elevated temperatures. This makes direct synthesis ...
Later (1902), Mendeleev accepted the evidence for their existence, and they could be placed in a new "group 0", consistently and without breaking the periodic table principle. r Group name as recommended by IUPAC. h Hydrogen (H), while placed in group 1, is not considered to be part of the alkali metals.
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.