Reading Guide: Compounds Name ________________________

Chapter 4 Period _____ Date _____________

  1. On page 121 is a section about the physical properties of salt. What does it have to say about the electrical conductivity of melted and dissolved salt?

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  2. The pictures on page 123 are of elemental sodium and chlorine. How do the properties of sodium and chlorine atoms compare with the sodium and chlorine ions in table salt?

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  3. What does this indicate about the relative stability of the atoms and ions of sodium and chlorine?

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  4. In the section "When Atoms Collide," on page 130. What is primarily responsible for an atom's chemical properties?

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  5. Why are light bulbs filled with noble gases? (See Figure 4.10)

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  6. Page 132. What does it mean to say a particle has a noble gas configuration of electrons?

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  7. What are the two ways atoms can achieve a noble gas configuration of electrons?

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  8. Page 134. What is an ion?

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  9. What do we call a compound composed of ions?

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  10. Is a grain of salt made of just one sodium ion and one chloride ion?

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  11. What do we call the force that holds oppositely charged ions together?

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  12. See figure 4.15. Why is a water molecule so stable?

    13. Page 140. Define:

  13. Covalent bond

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  14. Covalent compound

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  15. Molecule

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  16. Can more than two electron be shared?

    17. I'm taking one aspect of bonding quite out of order compared to the text. My thinking is, the sooner you get acquainted with polyatomic ions, the better you'll be able to understand bonds and chemical reactions. So let's get introduced to polyatomic ions! (I remember as a chemistry student, I had problems with polyatomic ions. They are made of atoms that are covalently bonded, but as a group they have a charge and are thus ions. Yikes!)
  17. P 158. First, what is a polyatomic ion?

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  18. What type of bond holds the atoms within a polyatomic ion together?
  19. Are these strong or weak bonds compared to ionic bonds?

    20. So, the group of atoms as a whole should be thought of as ONE UNIT, with a charge.
  20. Copy the last two sentences of the first paragraph on page 159. And the first three sentences of the next paragraph. Read what you've written. It's important.

 

 

 

 

 

 

 

 

 

 

We'll deal more with polyatomic ions in the next unit and throughout the year. They won't go away. Learn them now and your life will be easier. Memorize those listed in your essential concepts!