Gayeon Kim/Phys 211 B/March 25, 2025/Chapter 7 Vocabulary

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Across
  1. 1. a chemical reaction in which one element in a compound is replaced by another element; also known as single-displacement reaction.
  2. 4. a substance that slows the reaction rate by reducing the effectiveness of catalysts.
  3. 6. an exothermic chemical reaction in which a fuel reacts with oxygen.
  4. 7. the state that occurs when forward and reverse reactions each happen at the same rate.
  5. 11. a combination of chemical formulas and symbols that models a chemical reaction
  6. 12. a chemical reaction in which two compounds swap cations or anions with each other; also known as double-displacement reaction.
  7. 14. a number is 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.
  8. 16. a mass of one mole of a substance.
  9. 18. the model that states for a reaction to occur, the reactant particles must collide with each other, with the proper alignment, and with enough energy.
  10. 20. a chemical reaction that absorbs more thermal energy than it releases
  11. 23. a reaction in which the products can react together to reform the original reactants.
  12. 24. a chemical reaction in which two compounds swap cations or anions with each other; also known as double-displacement reaction.
  13. 25. a substance that enters into a chemical reaction.
Down
  1. 2. a chemical reaction that releases more thermal energy than it absorbs.
  2. 3. the minimum energy needed for a chemical reaction to occur.
  3. 5. a gain of electrons in a chemical reaction.
  4. 8. a process that rearranges the atoms in one or more substances into one or more new substances.
  5. 9. the speed of a reaction.
  6. 10. the principle that states that a chemical system in equilibrium will adjust its equilibrium position in such a way as to reduce the effects of any changes made to the system.
  7. 13. the law that states that energy can not be created or destroyed but can be transformed between objects.
  8. 15. a chemical reaction in which two or more reactants combine into a single, more complex product
  9. 17. SI fundamental unit of for the quantity of mater in a substance; a count equal to 6.022 x 10^23
  10. 19. a loss of electrons in a chemical reaction.
  11. 21. a substance that is formed during a chemical reaction.
  12. 22. a substance that helps a reaction happen faster but is not used up in the reaction.