How is the modern periodic table different from Dmitri mendeleev's table?

Answer 1

The only important difference is that the modern periodic law must be framed in terms of atomic numbers, where Mendeleev framed the original periodic law in terms of atomic weights.

There are only three places where this makes a difference. For cobalt and nickel Mendeleev assigned both exactly the same atomic weight -- well within the error margins at the time. For tellurium and iodine, Mendeleev insisted, wrongly, that the recognised atomic weight of tellurium was wrong, and that it had to be less than that of iodine. And the third case did not come up until later, because argon was not discovered until 1894 (element number 18, argon, has an atomic weight greater than that of element 19, potassium).

Answer 2

The modern Periodic Table is arranged based on atomic number, whereas Mendeleev's table was based on Atomic Mass. Additionally, the modern periodic table has more elements and is more organized with elements grouped by similar properties in columns. Mendeleev's table had gaps for undiscovered elements, which were later filled as new elements were discovered.

Answer 3

Well, honey, the modern periodic table is like the upgraded version of Dmitri Mendeleev's original creation. It's still got all the elements laid out in order of increasing atomic number, just like Dmitri did, but now it's organized based on atomic structure rather than just atomic weight. Think of it as the new and improved model - same concept, but with a few fancy updates.

Answer 4

Modern periodic law is based uponAtomic numbers while Mendeleev's law was based upon Atomic masses.

Answer 5

modern periodic table is arranged in the order of increasing atomic number whereas mendeleev's table was arranged in order of increasing atomic masses.