Chemistry 0.0 / 5 ? ChemistryAtomic StructureASOCR Created by: Jessie LunnCreated on: 22-01-15 14:24 What are isotopes? Atoms of the same element that have different amounts of neutrons. 1 of 13 Relative isotopic mass the mass of an atom compared to one-twelfth of the mass of a carbon-12 atom. 2 of 13 Relative atomic mass the weighted mean mass of an atom of an element compared to one-twelfth of the mass of a carbon-12 atom. 3 of 13 Relative molecular mass the weighted mean mass of a formula unit compared with one-twelfth of the mass of a carbon-12 atom. 4 of 13 Avodagro constant 6.02 x 10(23) 5 of 13 Empirical formula the simplest whole-number ratio of atoms of each element in a compound. amount/Mr 6 of 13 Moles and gases n=v/24(000). Molar volume is the volume per mole of gas molecules. 7 of 13 Moles and solutions n=cxv (/1000). Divide by 1000, if volume is in cm. 8 of 13 Moles and reactions n=m/Mr. 9 of 13 Equations Gas= n=v/24(000). Solution= n=cxv. Solid= n=m/Mr 10 of 13 Acids Proton donors. When an acid is added to water, the acid releases H+ ions. 11 of 13 Bases Proton acceptor. 12 of 13 Uses of hydroxides? Magnesium hydroxide is used for treating acid indigestion. Calcium hydroxide is used as lime to treat acid soils. 13 of 13
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