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A LITTLE SOMETHING WORTH KNOWING

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Lead · chemical symbol

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Lead was once common in plumbing and paint and carries the symbol Pb from the Latin word plumbum. Source: Lead

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  1. 57This element was identified in sunlight decades before it was found on Earth, and now fills balloons and airships.RECALL
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  2. 58Helium · chemical symbolRECALL
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  3. 59Compounds of this highly reactive halogen are used in toothpaste to help prevent decay.RECALL
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