Question

explain how is the modern periodic table different from mendeleev’s periodic table?

Explanation:

The modern periodic table is based on atomic number, while Mendeleev's was based on atomic mass. In the modern table, elements are arranged more accurately, and there are more elements discovered. Also, the modern table has a more standardized group - numbering system.

Answer:

The modern periodic table arranges elements by atomic number instead of atomic mass like Mendeleev's. It has more elements and a more standardized group - numbering system.