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Unformatted text preview: many the second?, how many the third? 4. Can you explain a covalent bond? What is the valence of Hydrogen, Oxygen, Nitrogen, Carbon? 5. What is an ionic bond? What is an ion? What happens when you dissolve NaCl in water? 6. Can you distinguish between nonpolar covalent and polar covalent molecules? 7. What is a hydrogen bond such as between water molecules? Why is ice less dense than liquid water?...
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- Spring '07