You are watching: Why did mendeleev leave spaces in his periodic table
He arranged his table right into durations with prefer properties and also put it in enhancing order by atomic mass.
What was the significant difference in between the routine table Newlands produced and the periodic table Mendeleev created?
Mendeleev thought that durations were not addressed in size, and Mendeleev likewise accounted for aspects that weren"t also known yet.
Potassium and also Sodium have actually comparable chemical properties bereason they are in the exact same team on the Periodic Table.
Law of Octaves, Noticed properties repetitive every 8 elements, arranged 49 well-known elements right into rows of 7 arranged in order of increasing atomic mass
Agreed via Newland that properties recurring, however he believed periods were not fixed in length. Placed 7 aspects in the first two durations and also then 17 in the third arranged in order of boosting atomic mass. Left blank spots to account for facets that had not yet been found. He knew that facets belonged there and even predicted their properties.
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Determined that the regular properties lined up much better if elements were arranged by enhancing atomic number, not atomic mass. This addressed Mendeleev"s difficulties. He also stated the Periodic Law.