Chemistry
What symbol appears on the periodic table for Thorium which has the atomic number 90?
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Which element is commonly used in catalytic converters due to its properties as a reducing agent?
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What symbol appears on the periodic table for the element with the atomic number 96?
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The Nature of the Chemical Bond, was published in 1939, who wrote it?
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A critical component of vitamin B-12, what element is the only metal found in vitamins?
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