Chapter 7 vocab Makayla Hair PS 211-B 3/25/25

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Across
  1. 2. a chemical reaction in which one element in a compound is replaced by another element
  2. 9. a law that states that energy cannot be created or destroyed but only transferred between objects or transformed
  3. 10. equation a combination of chemical formulas and symbols that models a chemical reaction
  4. 12. a loss of electrons in a chemical reaction
  5. 14. the mass of one molar of a substance
  6. 15. A substance that helps a reaction happen faster but is not used up in the reaction
  7. 18. a chemical reaction in which two compounds swap cations or anions with each other
  8. 19. a gain of electrons in a chemical reaction
  9. 20. a chemical reaction that releases more thermal energy that it absorbs
  10. 21. the minimum energy needed for a chemical reaction to occur
  11. 23. a chemical reaction that absorbs more thermal energy that it releases
Down
  1. 1. a chemical reaction in which two or more reactants combine into a single, more complex product
  2. 3. a 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
  3. 4. A number placed in front of a chemical formula within a chemical equation that shows how many units of reactant or product is needed to balance the chemical equation
  4. 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
  5. 6. a chemical in which a single reactant breaks down into two or more products
  6. 7. a substance that is formed during a chemical reaction
  7. 8. a substance that enters into a chemical reaction
  8. 11. a state that occurs when forward and reverse reactions each happen at the same rate
  9. 13. a process that rearranges the atoms in one or more substances into one or two new substances
  10. 15. an exothermic chemical reaction in which a fuel reacts with oxygen
  11. 16. a reaction in which the products can react together to re-form the original reactants.
  12. 17. a substance that slows the rate of a reaction by reducing the effectiveness of catalysts
  13. 22. SI fundamental unit for the quantity of of matter in a substance