platinum group elements
21platinum metal — noun : any of the six precious metallic elements including platinum and elements resembling it in chemical and physical properties that belong to group VIII of the periodic table and are often subdivided into two triads one of which is composed… …
22Platinum hexafluoride — Chembox new ImageFile = PtF6.png ImageSize = 200px IUPACName = Platinum hexafluoride OtherNames = Platinum(VI) fluoride Section1 = Chembox Identifiers CASNo = Section2 = Chembox Properties Formula = PtF6 MolarMass = 309.1 Appearance = red Density …
23Abundance of the chemical elements — Estimated proportions of matter, dark matter and dark energy in the universe. Only the fraction of the mass and energy in the universe labeled atoms is composed of chemical elements. The abundance of a chemical element measures how relatively… …
24Nitrogen group — Group 15 Period 2 7 N 3 …
25Timeline of chemical elements discoveries — The discovery of the elements known to exist today is presented here in chronological order. The elements are listed generally in the order in which each was first defined as the pure element,[clarification needed] as the exact date of discovery… …
26Collective names of groups of like elements — is the term used by IUPAC to describe nomenclature for categorization of chemical elements.[1] The following names are approved by IUPAC: Alkali metals The metals of group 1: Li, Na, K, Rb, Cs, Fr. Alkaline earth metals The metals of group 2: Be …
27List of elements — Contents 1 Chemical series legend 2 Guide to column titles 3 List 4 Notes 5 References …
28List of fictional elements, materials, isotopes and atomic particles — This list contains chemical elements, materials, isotopes or (sub)atomic particle that exist primarily in works of fiction (usually fantasy or science fiction). No actual periodic elements end in ite , though many minerals have names with this… …
29POD (group) — P.O.D. (groupe) Pour les articles homonymes, voir POD …
30oxygen group element — ▪ chemical element Introduction also called chalcogen, any of the five chemical elements making up Group 16 (VIa) of the periodic classification namely, oxygen, sulfur, selenium, tellurium, and polonium. (See Figure >.) A relationship among… …
