character: Hydrogen
topic: Reactivity Series of Metals
grade: 9
subject: Chemistry
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character: Sodium
topic: Alkali Metals and Reactivity
grade: 9
subject: Chemistry
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character: Copper
topic: Reactivity of Transition Metals
grade: 9
subject: Chemistry
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character: Magnesium
topic: Comparison with Hydrogen in Reactivity
grade: 9
subject: Chemistry
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