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7 September, 11:58

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

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  1. 7 September, 12:13
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    True because at the time some scientists did not know the unknown elements.
  2. 7 September, 12:19
    0
    False, his periodic table was the first one, nobody knew about more elements in that time rather than the ones in the periodic table
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