Module 2.1 Definitions 0.0 / 5 ? ChemistryModule 2.1A2/A-levelOCR Created by: Ben123SCreated on: 22-04-19 11:56 Isotopes Atoms of the same element with different number of neutrons and different masses. They react in the same way. 1 of 10 Relative Isotopic Mass The mass of an isotope relative to 1/12th of the mass of an atom of 12C 2 of 10 Relative Atomic Mass The weighted mean mass of an atom relative to 1/12th the mass of atom of 12C 3 of 10 The mole (One mole) 6.02x10^23 mol^-1 (avogadro's constant) 4 of 10 Acids Release H+ ions into aqueous solution 5 of 10 Bases React with acids by accepting H+ ions to form salts 6 of 10 Alkalis Soluble bases which release OH- ions into aqueous solution 7 of 10 Salts A salt is formed when the H+ ion in an acid is displaced by a metal (or ammonium) ion 8 of 10 Strong Acid Completely dissociates when dissolved in water 9 of 10 Weak Acid Partially Dissociates when dissolved in water 10 of 10
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