You are watching: Why did mendeleev leave spaces in his periodic table
He organized his table right into durations with prefer properties and put it in enhancing order by atomic mass.
What was the major difference in between the regular table Newlands created and also the periodic table Mendeleev created?
Mendeleev believed that durations were not fixed in length, and Mendeleev additionally accounted for elements that weren"t also well-known yet.
Potassium and also Sodium have actually comparable chemical properties bereason they are in the very same team on the Periodic Table.
Law of Octaves, Noticed properties recurring every 8 aspects, arranged 49 recognized aspects right into rows of 7 arranged in order of raising atomic mass
Agreed with Newland that properties recurring, however he believed durations were not resolved in size. Placed 7 facets in the initially 2 periods and also then 17 in the 3rd arranged in order of enhancing atomic mass. Left empty spots to account for elements that had actually not yet been found. He knew that aspects belonged there and even predicted their properties.
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Determined that the routine properties lined up much better if elements were arranged by enhancing atomic number, not atomic mass. This resolved Mendeleev"s problems. He additionally proclaimed the Periodic Law.