Chapter7 vocabulary Physical Sciece PS211 Elizabeth Murphy3/25/25

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Across
  1. 3. - Number placed in front of the chemical formula
  2. 5. - A gain of electrons in chemical reaction
  3. 6. - Substances that helps a reaction happen faster
  4. 9. equation - A combination of Chemical Formula
  5. 10. Reaction - A process that rearranges atoms in one or more substances
  6. 11. - Substance formed during a chemical reaction
  7. 13. Model - States for a reaction to occur
  8. 14. - SI fundamental unit forthe quantity of matter
  9. 15. replacement reaction - Chemical reaction in which one element compound is replaced by another element
  10. 18. energy - Energy needed for a chemical reaction to occur
  11. 21. - An exothermic chemical reaction fuel reacts with oxygen
  12. 23. - A substance that enters into a chemical reaction
  13. 24. reaction - Chemical reaction that releases more thermal energy that it aborbs
Down
  1. 1. rate - Speed of Reaction
  2. 2. - A loss of electrons in chemical reaction
  3. 4. reaction - Absorbs more thermal energy than it releases
  4. 7. replacement reaction - Two compounds swap cations or anions
  5. 8. equilibrium - A State that occurs when ward and reverse reactions
  6. 12. reaction - Chemical reaction single reactant breaks down into two or more products
  7. 16. Chatelier's Principle- States that a chemical system will adjust
  8. 17. of conservation of energy - law that states energy can not be created or destroyed
  9. 19. - Slows the rate of a reaction
  10. 20. Mass - The mass of one mole of a substance
  11. 22. reaction - Chemical reaction Two or more reactants combine
  12. 23. reaction - Products can react together to reform original reactants