Chemistry
The red color of rubies is caused mainly by the presence of what element?
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What element gets its name from the Greek word "kryptos" meaning "the hidden one"?
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What is often used in advertising signs and produces a bright reddish-orange light?
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Which is a chemical often injected into lips for plastic surgery?
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What are the products of propanoic acid and ethanol when the two are combined with warm sulphuric acid?
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What symbol appears on the periodic table for the element with the atomic number 88?
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Which mineral is highly valued as an industrial flux?
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The Nature of the Chemical Bond, was published in 1939, who wrote it?
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