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Which element has the symbol 'Na' on the periodic table?
Which element has the symbol 'Na' on the periodic table?
Which element has the symbol 'Fe' on the periodic table?
Which element has the symbol 'Fe' on the periodic table?
Which element has the symbol 'Pb' on the periodic table?
Which element has the symbol 'Pb' on the periodic table?
Which element has the symbol 'H' on the periodic table?
Which element has the symbol 'H' on the periodic table?
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Which element has the symbol 'C' on the periodic table?
Which element has the symbol 'C' on the periodic table?
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Which element has the symbol 'O' on the periodic table?
Which element has the symbol 'O' on the periodic table?
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