Lead is soft and malleable, and also has a relatively low melting point.When freshly cut, lead is a shiny gray with a hint of blue. The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). Bleach is the generic name for any chemical product that is used industrially or domestically to remove color (whitening) from a fabric or fiber or to clean or to remove stains in a process called bleaching. Hydrates 'Ah, I need to hydrate!' Niobium is a chemical element with chemical symbol Nb (formerly columbium, Cb) and atomic number 41. It tends to decrease down a column of the periodic table because the number of electron shells is larger, making each ion further away It is the third-lightest element in group 17 of the periodic table and is a volatile red-brown liquid at room temperature that evaporates readily to form a similarly coloured vapour.Its properties are intermediate between those of chlorine and iodine.Isolated independently by two chemists, Carl Jacob A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Therefore, lithium is an alkali metal. 1972]) is about as acutely toxic as hydrogen chloride (with a rat 1hour LC50 of 3,124 ppm [MacEwen and Vernot 1974]). Silver is a chemical element with the symbol Ag (from the Latin argentum, derived from the Proto-Indo-European her: "shiny" or "white") and atomic number 47. . Bleach is the generic name for any chemical product that is used industrially or domestically to remove color (whitening) from a fabric or fiber or to clean or to remove stains in a process called bleaching. The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). The heaviest of the stable halogens, it exists as a semi-lustrous, non-metallic solid at standard conditions that melts to form a deep violet liquid at 114 C (237 F), and boils to a violet gas at 184 C (363 F). A silvery-white metallic d-block element, it has historically been classified as a rare-earth element, together with yttrium and the lanthanides.It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia.. Scandium is present in most of the deposits of rare Thus, Grignard reagent formation from an alkyl halide reduces the substituted carbon atom. The symbol R is used to designate a generic (unspecified) alkyl group. The letter R in the following illustrations is widely used as a symbol for a generic group. Niobium is a chemical element with chemical symbol Nb (formerly columbium, Cb) and atomic number 41. A coordination complex consists of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents. Nitrogen atoms form covalent bonds with hydrogen atoms. Magnesium is a chemical element with the symbol Mg and atomic number 12. Everyone knows what it means to hydrate. 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