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20. When two atoms have different electronegativities, they will interact to form A equal numbers of isotopes B. lons C Polar Covalent Bonds D. Non-Polar Covalent Bonds E lonic Bonds 21. How many electrons would you expect to find in the valence shell of an atom that forms 3 covalent bonds? A 2 B. 3 C4 D. 5 E6 22. Which of the following is the most polar covalent bond? A C-H B. C-C I CC-0 D. OH E 0-0 23. When a molecule cannot form hydrogen bonds with water, it is said to be what? A hydrophilic B. hydrophobic Camphlpathic D. Ionic 24. What type of bond is formed when a positive charged atom Interacts with a negatively charged atom? A polar covalent B. nonpolar covalent Clonic D. hydrogen E Van der Waals 25. Which of the following are the building block used by cells to make DNA? A amino acids B. nucleotides Cfatty adds D. monosaccharides 26. Polymers are broken down into monomers by what general process? A Condensation reaction B. Fission C Hydrolysis D. Glycosidic reaction E Phosphorylation 27. Saturated fatty acids: A are the predominant fatty acid in oll B. have at least one double bond between carbon atoms Chave no double bonds between carbon atoms D. have fewer hydrogen groups