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Sifat-sifat logam, metaloid dan non logam. Semua unsur di alam ini dapat sebagai gas, zat cair, zat pada t, atau plasma. Tetapi secara sistem periodik, unsur juga dapat digolongkan sebagai logam, metaloid, ataupun non logam. Kelompok unsur terbesar adalah kelompok unsur logam.
Nonmetals are chemical elements that mostly lack distinctive metallic properties. They range from colorless gases like hydrogen to shiny crystals like iodine. Physically, they are usually lighter (less dense) than metals; brittle or crumbly if solid; and often poor conductors of heat and electricity.
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Some nonmetals (C, black P, S, and Se) are brittle solids at room temperature (although each of these also have malleable, pliable or ductile allotropes). From left to right in the periodic table, the nonmetals can be divided into the reactive nonmetals and the noble gases.
The dividing line between metals and nonmetals can be found, in varying configurations, on some representations of the periodic table of the elements (see mini-example, right). Elements to the lower left of the line generally display increasing metallic behaviour; elements to the upper right display increasing nonmetallic behaviour.
Dalam kimia, nonlogam adalah sebuah unsur kimia yang umumnya tidak memiliki sifat logam yang dominan; mereka berkisar dari gas tak berwarna (seperti hidrogen) hingga padatan mengkilap dengan titik lebur yang tinggi (seperti boron ). Elektron pada nonlogam berperilaku berbeda dari elektron pada logam. Dengan beberapa pengecualian, nonlogam tetap ...
Non-ferrous metal. In metallurgy, non-ferrous metals are metals or alloys that do not contain iron ( allotropes of iron, ferrite, and so on) in appreciable amounts. Generally more costly than ferrous metals, non-ferrous metals are used because of desirable properties such as low weight (e.g. aluminium ), higher conductivity (e.g. copper ), [1 ...
Beberapa unsur menunjukkan sifat baik logam dan nonlogam sekaligus. Astrofisikawan menggunakan istilah "metal" untuk menjelaskan secara kolektif seluruh unsur selain hidrogen dan helium, dua unsur paling sederhana, dalam suatu bintang.
