| 31. | Most thunderstorms have positive charges near the top and negative charges at the bottom.
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| 32. | Suppose two positive charges are at rest ( initially ) close to one another.
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| 33. | An electron moving through a conductor will attract nearby positive charges in the lattice.
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| 34. | Some azo dyes are modified with sulfonium groups to give them a positive charge.
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| 35. | This group has a partial positive charge and therefore is susceptible to nucleophilic attack.
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| 36. | He 2 2 + is the smallest possible molecule with a double positive charge.
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| 37. | Free protons have a positive charge and are much heavier.
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| 38. | Lack of a positive charge means chitosan is insoluble in neutral and basic environments.
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| 39. | If so, positive charge builds up, if not, no thrust.
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| 40. | As a result, the first strokes tend to lower positive charges to the ground.
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