Water is the chemical substance with chemical formula H 2 O one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom Water is a JJ Thomsons experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons Thomsons plum pudding model History Philippe Gengembre 17641838 a student of Lavoisier first obtained phosphine in 1783 by heating phosphorus in an aqueous solution of potash potassium Definition of BrnstedLowry acids and bases strong and weak acids and bases and how to identify conjugate acidbase pairs In chemistry a nonmetal or nonmetal is a chemical element that mostly lacks metallic attributes Physically nonmetals tend to be highly volatile easily The formation of an astatine compound with hydrogen usually referred to as hydrogen astatide was noted by the pioneers of astatine chemistry As mentioned NickelII chloride or just nickel chloride is the chemical compound NiCl 2 The anhydrous salt is yellow but the more familiar hydrate NiCl 2 6H 2 O is green Calcium sulfate or calcium sulphate is the inorganic compound with the formula CaSO 4 and related hydrates In the form of anhydrite the anhydrous form it is Sodium hydroxide also known as lye and caustic soda is an inorganic compound with formula NaOH It is a white solid ionic compound consisting of sodium cations Na Silicon dioxide also known as silica from the Latin silex is an oxide of silicon with the chemical formula Si O 2 most commonly found in nature as quartz and in
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