alkaline-earth element
91Glossary of chemistry terms — This page is a glossary of chemistry terms. Chemistry has an extensive vocabulary and a significant amount of jargon. This is a list of chemical terms, including laboratory tools, glassware, and equipment. Chemistry itself is a physical science… …
92Noble gas — Group 18 Period 1 2 He 2 …
93Collective 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 …
94carbide — /kahr buyd, bid/, n. 1. a compound of carbon with a more electropositive element or group. 2. See calcium carbide. 3. a very hard mixture of sintered carbides of various heavy metals, esp. tungsten carbide, used for cutting edges and dies. [1860… …
95Otto Hahn — Hahn in 1944 Born 8 March 1879 …
96radium — /ray dee euhm/, n. 1. Chem. a highly radioactive metallic element whose decay yields radon gas and alpha rays. Symbol: Ra; at. wt.: 226; at. no.: 88. 2. a lustrous rayon or silk fabric constructed in plain weave and used in women s apparel,… …
97hydride — /huy druyd, drid/, n. a binary compound formed by hydrogen and another, usually more electropositive, element or group, as sodium hydride, NaH, or methyl hydride, CH4. [1840 50; HYDR 2 + IDE] * * * Inorganic compound of hydrogen with another… …
98Metalloid —   13 14 15 16 17   2  B Boron …
99Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
100calcium — /kal see euhm/, n. Chem., Biol. a silver white divalent metal, occurring combined in limestone, chalk, gypsum, etc., occurring also in vertebrates and other animals, as a component of bone, skeletal mass, shell, etc., and as a necessary element… …
