Across
- 3. A combination of chemical formulas and symbols that models a chemical equation
- 7. reaction: A chemical reaction that absorbs more thermal energy than it releases
- 10. A substance that slows the rate of a reaction by reducing the effectiveness of catalysts
- 11. model: The model that states that for a reaction to occur, the reactant particles must collide with each other, with the proper alignment and with enough energy
- 14. SI fundamental unit for the quantity of matter in a substance; a count equal to 6.022x10²³
- 17. reaction: A chemical reaction in which one element in a compound is replaced by another element; also known as a single-displacement reaction
- 18. energy: The minimum energy needed for a chemical reaction to occur
- 21. reaction: A chemical reaction that releases more thermal energy than it absorbs
- 23. rate: The speed of a reaction
- 24. : A propcess that rearranges the atoms in one or more substances into one or more new substances
- 25. reaction: A chemical reaction in which two or more reactants combine into a single, more complex product.
Down
- 1. A gain of electrons in a chemical reaction.
- 2. A number placed in front of a chemical formula within a chemical equation that shows how many units of a reactent or product are needed to balance the chemical equation
- 4. An exothermic chemical reaction in which a fuel reacts with oxygen.
- 5. reaction: A chemical reaction in which two compounds swap cations or anions with each other; also known as a double-displacement reaction
- 6. of conservation of energy: The law that states that energy cannot be created or destroyed but only transferred between objects or transformed; also known as the first law of thermodynamics
- 8. A substance that enters into a chemical reaction
- 9. reaction: A chemical reaction in which a single reactant breaks down into two or more products
- 12. Chatelier's principle: The principle that states that a chemical system in equilibrium will adjust its equilibrium position in such a way as to reduce the effect of any changes made to the system
- 13. A substance that helps a reaction happen faster but is not used up in the reaction
- 15. reaction: A reaction in which the products can react together to re-form the original reactants
- 16. A substance that is formed during a chemical reaction.
- 19. equilibrium: Rhe state that occurs when forward and reverse reactions each happen at the same rate
- 20. A loss of electrons in a chemical reaction
- 22. mass: The mass of one mole of a substance