who invented this system?
Dmitri Ivanovich Mendeleev
Periodic table
Mendeleev published in 1869, using atomic weight to organize the elements, information determinable to fair precision in his time.
what is hassium? It is a chemical element. where is it naturally found? It is not known to occur naturally on Earth. is it used in any fusion reactions? Yes, it was used in Cold fusion. where does the name of the element come from? Under Mendeleev's nomenclature, It would be known as "eka-osmium", as in "the first element below osmium in the periodic table". what are the physical properties of the above-mentioned element? It should crystallize in the hexagonal close-packed structure. where is this used? It is used in the field of Experimental chemistry. are any precautions needed while using it? UNANSWERABLE what is the table used to describe the elements? periodic table
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Periodic table [SEP] Mendeleev's table
Mendeleev was not the first chemist to do so, but he was the first to be recognized as using the trends in his periodic table to predict the properties of those missing elements, such as gallium and germanium. The second decision was to occasionally ignore the order suggested by the atomic weights and switch adjacent elements, such as tellurium and iodine, to better classify them into chemical families. Mendeleev published in 1869, using atomic weight to organize the elements, information determinable to fair precision in his time. Atomic weight worked well enough to allow Mendeleev to accurately predict the properties of missing elements.