What are the differences between Mendeleev's periodic table and the modern periodic table?

Answer 1

Mendeleev did not arrange them in an order where the elements were grouped with elements that acted similar to the ones surrounding it, or that share properties or are inclined to bond.


Check out: http://spiff.rit.edu/classes/phys314/lectures/period/mendeleev_1871.gif

Answer 2

Mendeleev's periodic table is barely somewhat diverse from the only we use on the instant. Mendeleev's periodic table became arranged by way of mass and the residences of chemical compounds, Mendeleev believing that each and every 8 chemical compounds shared an identical residences. additionally Mendeleev's table had countless gaps for aspects that had no longer been discovered yet. on the instant's periodic table has been stuffed thoroughly, with extra aspects to be extra on the tip. additionally the popular periodic table is taken care of by way of atomic huge type rather of mass.

Answer 3

M had several missing elements: Sc, Ge and Ga. Not sure on the last one. There were some others, including a wrong prediction, but I don't remember what it was. Missing in that he left a blank spot in his table for them. The modern table has them filled in.

M did not have the entire noble gas family being as it was discovered well after he put together his table.

I can't remember if he had a lanthanide series, but he sure didn't have an actinide series. Seaborg added that last one about 1940, probably the last major addition to the modern periodic table.

There is a whole web site devoted to M, run out of a university in Russia.

Answer 4

First, there were not as many elements known in Mendeleev's day. The Lanthanide-Actinide analogs (4f and 5f orbital filling) was not known.
Elements above atomic number 92 were unknown as was element 43 and one other that is naturally radioactive.

Answer 5

there are more elements found today than on the one M had.

Answer 6

m's was bigger