Chemistry Definitions 0.0 / 5 ? ChemistryEnthalpyASEdexcel Created by: ryanh2197Created on: 14-01-14 20:54 89731246105 Across 1. A group of atoms bonded together (8) 4. The smallest particle of a chemical element that can exist (4) 5. A charged atom or charged group of atoms (3) 6. Something that is composed of two or more separate elements (8) 7. The heat exchanged by a reaction at constant pressure (8, 6) 10. The relative molecular or formula mass in grams per mole (5, 4) Down 2. A pure substance that cannot be broken down chemically into anything simpler (7) 3. The distortion of the negative ion as a result of the electrons being attracted by the positive ion (12) 8. The mass of a particular isotope of an atom compared to the mass of a carbon-12 atom (8, 8, 4) 9. The simplest ratio of atoms in a compound (9, 7)
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