2. The Description of the Periodic Table.
3. Predictions Come True.
4. Characteristic Features of One of the Groups of Elements.
DO YOU KNOW THAT...
At present 109 elements arc known to the world science, some of them
have only hypothetical existence. Attempts arc being made to synthesize
them in laboratory. Two elements bear the names of great Russian scientists
Mendeleyev and Kurchatov. They arc No. 101 (mcndclcvium) and No.
104 (kurchatovium). The development of the science of periodicity was
greatly influenced by the synthesis of transuraniums. Ruthenium (No. 44)
was named in honour o f Russia.
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