character: Lithium
topic: Uses of Lithium in Batteries
grade: 9
subject: Chemistry
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character: Sodium
topic: Sodium in Cooking and Preservation
grade: 9
subject: Chemistry
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character: Potassium
topic: Potassium in Biological Functions
grade: 9
subject: Chemistry
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character: Cesium
topic: Uses of Cesium in Timekeeping
grade: 9
subject: Chemistry
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