Chemistry
The first element on the periodic table of elements with an atomic number of 1 is?
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What symbol appears on the periodic table for Calcium which has the atomic number 20?
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What allotrope of oxygen helps protect the biosphere from solar ultraviolet radiation?
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What is the symbol used on the periodic table for the element Francium?
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Which creature uses its Jacobson's Organ to identify chemical signals?
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What is the chemical element with symbol "N" and atomic number 14?
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