Across
- 3. combine two or more reactants into a single, more complex product
- 4. slow the rate of a reaction be reducing the effectiveness of catalysts
- 5. one element in a compound is replaced by another element
- 12. when elements, especially metals, react with oxygen
- 13. a combination of chemical formulas and symbols that models a chemical reaction
- 18. states that we need three things to happen before reactants will react
- 21. two compounds swap cations or anions with each other
- 23. states that any chemical system in equilibrium will adjust its equilibrium state in such a way as to reduce the effect of any changes made to the system
- 24. a substance that helps a reaction happen faster but is not used up in the reaction
- 25. states that during a chemical reaction no energy is created or destroyed, but only changed from one form to another
Down
- 1. the energy needed to get a chemical reaction started
- 2. a process that changes a substance into one or more different substances
- 6. the number placed in front of a chemical formula within a chemical equation
- 7. speed of a reaction
- 8. the substances that reactants combine to produce
- 9. a defined quantity of items
- 10. occurs when the forward and reverse reactions each happen at the same rate
- 11. the substances that enter into a chemical reaction
- 14. the mass of one mole of a substance
- 15. when a single reactant bond breaks down into two or more products
- 16. a reaction that is able to be reversed or reverted
- 17. when a substance, usually a fuel, reacts with oxygen
- 19. a reaction that absorbs more energy than it releases
- 20. reactions that release energy as heat
- 22. the gaining of electrons during a chemical reaction