How were the transition metals first incorporated into the periodic table? How d

Question

How were the transition metals first incorporated into the periodic table? How did the incorporation of the transition metals change the organization of the periodic table? When Mendeleev created the periodic table, one of the noble gases were known. How did the discovery of the noble gasses alter the periodic table? How do man made elements fit into the periodic table? Predict the properties of the element #117. You will have to look for relevant information for other elements to explain your rationale. Atomic mass Density Melting point Common chemical formulae

Explanation / Answer

5. Transition metals were first incorporated into the table in 1868 according to their increasing weight order with elements with the same valence in a given column. When transition metals were incorporated in the periodic table Mendeleev published his periodic table of the known elements, predicted new elements to help complete his table and corrected the atomic weights of some of the elements

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