The major difference between the periodic table created by Dmitri Mendeleev and the one created by Henry Moseley is that: Moseley arranged the elements in order of increasing atomic number. Mendeleev ordered his components so as of their relative atomic mass, and this gave him some issues.

Hint: Genesis of periodic classification of elements into groups and development of periodic law and the periodic table….Complete step by step solution:

The main difference between Mendeleev and Modern Periodic Table is that Mendeleev’s periodic table orders the elements based on their atomic mass whereas Modern periodic table orders the elements based on their atomic number.

The modern periodic table does correct the defects of Mendeleev’s periodic table. However, it is the right places for them but is against Mendeleev’s periodic law. These elements atomic number shows the reverse order compared to atomic mass.

And in the concluding chapter of the first addition of his famous book The Principles of Chemistry (1871), Mendeleev formulated the basic postulate of periodicity as follows: “The physical and chemical properties of the elements, which appear in the properties of the simple and complex bodies formed by them, have a …

The modern periodic table now provides a useful framework for analyzing chemical reactions, and continues to be widely used in chemistry, nuclear physics and other sciences.

Dmitri Mendeleev

Modern periodic law was proposed by Henry Moseley in 1913. According to the modern periodic law, the properties of the elements and their compounds are a periodic function of their atomic numbers.

The modern periodic law states that “Physical and Chemical properties of elements are periodic functions of their atomic number “. In the modern periodic table, the elements are arranged in the order of their increasing atomic number.