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Is the following sentence true or false? Mendeleev used his periodic table to predict the properties of undiscovered elements.
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Is the following sentence true or false? Mendeleev used his periodic table to predict the properties of undiscovered elements.

User Nadra
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true because at the time some scientists did not know the unknown elements.
User Negative Correlation
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False, his periodic table was the first one, nobody knew about more elements in that time rather than the ones in the periodic table
User Andras Sanislo
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