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The chemical elements can be broadly divided into metals, metalloids, and nonmetals according to their shared physical and chemical properties.All elemental metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metallic elements; and have at least one basic oxide.
between elemental metals and nonmetals [20] Aspect Metals Nonmetals Appearance and form Shiny if freshly prepared or fractured; few colored; [38] all but one solid [39] Shiny, colored or transparent; [40] all but one solid or gaseous [39] Density: Often higher Often lower Plasticity: Mostly malleable and ductile Often brittle solids Electrical ...
Periodic_table_(metals–metalloids–nonmetals,_32_columns).png (783 × 210 pixels, file size: 4 KB, MIME type: image/png) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Periodic table of the chemical elements showing the most or more commonly named sets of elements (in periodic tables), and a traditional dividing line between metals and nonmetals. The f-block actually fits between groups 2 and 3; it is usually shown at the foot of the table to save horizontal space.
The nonmetals are divided into four classes that complement a four-fold division of the metals, with the noble metals treated as a subset of the transition metals. The metalloids are treated as chemically weak nonmetals, in a manner analogous to their chemically weak frontier metal counterparts.
Although most elemental metals have higher densities than nonmetals, [10] there is a wide variation in their densities, lithium being the least dense (0.534 g/cm 3) and osmium (22.59 g/cm 3) the most dense.
Nonmetals show more variability in their properties than do metals. [1] Metalloids are included here since they behave predominately as chemically weak nonmetals.. Physically, they nearly all exist as diatomic or monatomic gases, or polyatomic solids having more substantial (open-packed) forms and relatively small atomic radii, unlike metals, which are nearly all solid and close-packed, and ...
Twenty-two nonmetals including B, Si, Ge, As and Te. Tin and antimony are shown as being intermediate between metals and nonmetals; they are later shown as either metals or nonmetals. Astatine is counted as a metal. Emsley J 1971, The Inorganic Chemistry of the Non-metals, Methuen Educational, London, ISBN 978-0-423-86120-4. Twenty nonmetals.