How many element were arranged in Mendeléev's periodic table ?
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Despite that, Mendeleev had discovered what are called the Periodic Laws: He found that elements arranged in order of their atomic weights, could be grouped in terms of similar properties at regular intervals. Mendeleev's original table contained just 63 entries
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63 Elements
In Mendeleev's periodic table, elements were arranged on the basis of the fundamental property, atomic mass, and chemical properties. During Mendeleev's work, only 63 elements were known.
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