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Chapter 2 Review

Chapter 2 Review. True or False?. Atoms tend to undergo chemical reactions that decrease their stability FALSE. True or False. Mass # = # of protons + # of electrons FALSE. True or False. Oxidation occurs when a reactant loses electrons TRUE. True or False.

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Chapter 2 Review

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  1. Chapter 2 Review

  2. True or False? • Atoms tend to undergo chemical reactions that decrease their stability • FALSE

  3. True or False • Mass # = # of protons + # of electrons • FALSE

  4. True or False • Oxidation occurs when a reactant loses electrons • TRUE

  5. True or False • The products of an endergonic reaction posses less energy than the reactants • FALSE

  6. What are the charged particles that move around an atom’s nucleus? • Electrons

  7. This type of bond results when atoms share one or more pairs of electrons • Covalent

  8. What do we call the amount of energy needed to start a chemical reaction? • Activation energy

  9. Chemical reaction that can proceed forward and backward • Reversible

  10. One water molecule will bond to another water molecule by what type of bond? • Hydrogen

  11. What is the fundamental unit of matter? • Atom

  12. How many electrons can the energy level closest to the nucleus hold? • 2

  13. What types of bonds are broken when salt dissolves in water? • Ionic

  14. A basic solution has a excess of what type of ions? • Hydroxide

  15. True or False? • Catabolism is an example of an endothermic reaction • FALSE

  16. Isotopes contain the same number of protons, but a different number of which other subatomic particle? • Neutrons

  17. True or False • Activation energy is the amount of energy available to do work • FALSE

  18. If pH is increasing from 2 to 6, which ion is increasing in concentration? • Hydroxide

  19. Draw a Bohr diagram and a dot diagram for the following elements • Carbon • Nitrogen • Be able to draw these for various elements!

  20. Free hydrogen ions react with a water molecule to form what type of ion? • Hydronium

  21. What ultimately determines how elements bond to form compounds? • Number and arrangement of electrons in energy levels

  22. What do we call a substance able to neutralize small amounts of acids and bases? • Buffer

  23. Substance dissolved in a solution • Solute

  24. Amount of solute / fixed amount of solvent = ? • Concentration

  25. A pH is increasing from 4 to 9 • Which ion is increasing? • How many times more of this ion is present at pH of 9? • Hydroxide • 105 or 100,000

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