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Chemistry
The red color of rubies is caused mainly by the presence of what element?
Chemistry
The red color of rubies is caused mainly by the presence of what element?
Cadmium
Strontium
Chromium
Iron
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What particle has a positive charge of 1 unit?
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Which two transition metals do not exhibit diamagnetism?
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What is the symbol used on the periodic table for the element Protactinium?
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