Keith Vinston-PS 211 B-March 25, 2025-Chapter 8 Vocab

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Across
  1. 4. a chemical reaction in which one element in a compound is replaced by another element, also known as a single-displacement reaction
  2. 6. a reaction in which the products can react together to re-form the original reactants
  3. 9. a substance that helps a reaction happen faster but is not used up in the reaction
  4. 10. a gain of electrons in a chemical reaction
  5. 12. a chemical in which two compounds swap cations and anions with each other, also known as a double-displacement reaction
  6. 15. a chemical reaction that absorbs more thermal energy than it releases
  7. 17. the speed of a reaction
  8. 18. a loss of electrons in a chemical reaction
  9. 19. a chemical reaction in which a single reactant breaks down into two or more products
  10. 21. the state that occurs when forward and reverse reactions each happen at the same rate
  11. 22. a chemical reaction in which two or more reactants combine into a single, more complex product
  12. 23. 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
Down
  1. 1. the mass of one mole of a substance
  2. 2. the minimum energy needed for a chemical reaction to occur
  3. 3. 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
  4. 5. an exothermic chemical reaction in which a fuel reacts with oxygen
  5. 7. a process that rearranges the atoms in one or more substances into one or more new substances
  6. 8. SI fundamental unit for the quantity of matter in a substance, a count equal to 6.022 x 10^23
  7. 9. 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
  8. 11. 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
  9. 13. a chemical reaction that releases more thermal energy than it absorbs
  10. 14. a substance that enters into a chemical reaction
  11. 16. a combination of chemical formulas and symbols that models a chemical reaction
  12. 20. a substance that slows the rate of a reaction by reducing the effectiveness of catalysts