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Mendeleev later adjusted his table to correct the position of some elements. Two, it would allow future scientists to adjust the position of elements within the table without damaging its integrity. One, it allowed for the addition of new elements and groups of elements he did not predict. Mendeleev’s addition of dashes to his table was important for two reasons.
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At this time, people began conducting chemical experiments. The work that led to the periodic table began during the Age of Enlightenment. The study of the elements goes back to ancient times.