Chemistry
What is the symbol used on the periodic table for the element Protactinium?
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What number is also the same as proton number and the number of electrons of a neutral atom?
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The Nature of the Chemical Bond, was published in 1939, who wrote it?
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While acids dissolve most metals, what special mixture of acids is used to dissolve gold?
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What is the most commonly used material in the manufacturing of semiconductors?
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