Chapter 7 Vocabulary Jewel Massie PS211-B 3/25/25

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Across
  1. 3. the principle that states that a chemical system in equilibrium will adjust its equilibrium position in such a way as to reduce the effort of any changes made to the system
  2. 4. a chemical reaction in which two or more reactants combine into a single, more complex product
  3. 7. 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
  4. 8. a substance that enters into a chemical reaction
  5. 14. a reaction in which the products can react together to reform the original reactants
  6. 16. a substance that slows the rate of a reaction by reducing the effectiveness of catalysts
  7. 17. a substance that helps a reaction happen faster but is not used up in a reaction
  8. 18. a gain of electrons in a chemical reaction
  9. 19. 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
  10. 20. the principle that states that every effect has a specific, identifiable cause,and for every cause there is a definite and predictable effect
  11. 21. a loss of electrons in a chemical reaction
  12. 22. a chemical in which a single reactant breaks down into two or more products
  13. 23. a chemical reaction that absorbs more thermal energy than it releases
  14. 24. an exothermic chemical reaction in which a fuel reacts with oxygen
Down
  1. 1. a process that rearranges the atoms in one or more substancesinto one or two new substances
  2. 2. the mass of one molar of a substance
  3. 5. the state that occurs when forward and reverse reactions each happen at the same rate
  4. 6. a chemical reaction in which two compounds swap cations or anions with each other
  5. 9. the minimum energy needed for a chemical reaction to occur
  6. 10. a combination of chemical formulas and symbols that models a chemical reaction
  7. 11. SI fundamental unit for the quantity of of matter in a substance
  8. 12. a chemical reaction in which one element in a compound is replaced by another element
  9. 13. a substance that is formed during a chemical reaction
  10. 15. a chemical reaction that releases more thermal energy than it absorbs