Question

Discribe two differences between medeleevs periodic table and modern periodic table

Answer 1

Mendeleyevs periodic table had no atomic mass or number, it only had the symbol and name. There were many blank spaces in his table which he used to predict future elements to be discovered.

Step-by-step explanation:

Answer 2

1. in the modern periodic table, the elements are arranged in order of increasing atomic number (In Mendeleev's table, they were arranged in order of increasing atomic weight).
2. More elements are in the modern periodic table which have been discovered since Mendeleev's.
3. There are no gaps. The gaps in Mendeleev's have been filled by the elements that were discovered.
4. The transition elements are listed in a separate block where as Mendeleev's included them with the other elements.