Across
- 4. eactions that occur when two different atoms or molecules interact to form a different molecule or compound
- 8. reaction where heat energy is absorbed
- 14. any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron
- 15. substance present after a chemical reaction
Down
- 1. symbolic representations of chemical reactions where reactants and the products are expressed
- 2. a chemical reaction in which a fuel undergoes oxidation by reacting with an oxidising agent, resulting in the release of energy
- 3. substance that undergoes change in a reaction
- 5. a reaction in which one element is substituted for another element in a compound
- 6. a chemical reaction in which one reactant breaks down into two or more products
- 7. the amount of substance of a system which contains as many elementary entities
- 9. energy stored in the bonds of chemical compounds, like atoms and molecules.
- 10. reaction where heat engery is released
- 11. a number placed in front of a chemical symbol or formula
- 12. reactions in which the positive and negative ions of two ionic compounds exchange places to form two new compounds
- 13. the ratio between the mass and the amount of substance