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Chemical lighting 3 11 years 4 weeks ago
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11 years 2 weeks ago
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Toxicity??? 1 11 years 3 weeks ago
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11 years 3 weeks ago
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about ionic bond 7 11 years 3 weeks ago
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11 years 2 weeks ago
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about CO3 and CO2 4 11 years 3 weeks ago
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11 years 2 weeks ago
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What is Hydrogen Bonding? 3 11 years 2 weeks ago
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11 years 2 weeks ago
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Compounds....ugh 3 11 years 1 week ago
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5 years 32 weeks ago
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silicon difluoride 1 11 years 1 week ago
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11 years 1 week ago
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Discovery of Metals... 6 11 years 1 week ago
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8 years 28 weeks ago
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Influences... 5 11 years 1 week ago
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11 years 1 week ago
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WATER 13 11 years 5 days ago
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10 years 49 weeks ago
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