platinum group elements
121History of the periodic table — The history of the periodic table reflects over a century of growth in the understanding of chemical properties, and culminates with the publication of the first actual periodic table by Dmitri Mendeleev in 1869.[1] While Mendeleev built upon… …
122Rhodium — Eigenschaften …
123Magnetic monopole — It is impossible to make magnetic monopoles from a bar magnet. If a bar magnet is cut in half, it is not the case that one half has the north pole and the other half has the south pole. Inst …
124d-block — This article is about a class of chemical elements. For the hip hop record label, see D Block Records. For the hardstyle duo, see D Block S te Fan. The d block is the portion of the periodic table that contains the element groups 3 12.[1][2]… …
125Nonmetal — Nonmetal, or non metal, is a term used in chemistry when classifying the chemical elements. On the basis of their general physical and chemical properties, every element in the periodic table can be termed either a metal or a nonmetal. (A few… …
126Chemical reaction — Chemical reactions redirects here. For the 2007 television episode, see Chemical Reactions (Men in Trees). A thermite reaction using iron(III) oxide. The sparks …
127Copley Medal — The Copley Medal awarded to Mendeleev in 1905 …
128Nitride — In chemistry, a nitride is a compound of nitrogen where nitrogen has a formal oxidation state of −3. Nitrides are a large class of compounds with a wide range of properties and applications.[1] The nitride ion, N3–, is never encountered in… …
