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19 questions
Silver (a)
Gold (a)
Iron (a)
Titanium (a)
Zinc (a)
Tungsten (a)
Vanadium (a)
Scandium (a)
Chromium (a)
Manganese (a)
Cobalt (a)
Nickel (a)
Copper (a)
Cadmium (a)
Mercury (a)
Platinum (a)
Zirconium (a)
Uranium (a)
Plutonium (a)
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