Science Vocabulary Chapter 7

123456789101112131415161718192021222324
Across
  1. 3. A chemical reaction in which two or more reactants combine into a single, more complex product
  2. 5. 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
  3. 8. A substance that slows the rate of a reaction by reducing the effectiveness of catalysts
  4. 9. A chemical reaction that releases more thermal energy than it absorbs
  5. 12. The speed of a reaction
  6. 14. SI fundamental unit for the quantity of matter in a substance; a count equal to 6.022 X 10^23
  7. 15. An exothermic chemical reaction in which a fuel reacts with oxygen
  8. 16. A substance that enters into a chemical reaction
  9. 18. A reaction in which the products can react together to re-form the original reactants
  10. 19. A substance that helps a reaction happen faster but is not used up in the reaction
  11. 21. A chemical reaction that absorbs more thermal energy than it releases
  12. 23. A number placed in front of a chemical formula within a chemical equation that shows how many units of a reactant or product are needed to balance the chemical equation
  13. 24. A chemical reaction in which a single reactant breaks down into two or more products
Down
  1. 1. A substance that is formed during a chemical reaction
  2. 2. The state that occurs when forward and reverse reactions each happen at the same rate
  3. 4. The law that states that energy cannot be created nor destroyed, but only transferred between objects or transformed; also known as the first law of thermodynamic
  4. 6. The minimum energy needed for a chemical reaction to occur
  5. 7. A chemical reaction in which one element in a compound is replaced by another element; also known as a single-displacement reaction
  6. 10. A loss of electrons in a chemical reaction
  7. 11. A chemical reaction in which two compounds swap cations or anions with each other; also known as a double-displacement reaction
  8. 13. The mass of one mole of a substance
  9. 17. A combination of chemical formulas and symbols that models a chemical reaction
  10. 19. 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
  11. 20. A gain of electrons in a chemical reaction
  12. 22. A process that rearranges the atoms in one or more substances into one or more new substances