How could the Modern Periodic Table remove various anomalies of Mendeleev's Periodic Table?

Explanation

The inconsistencies in Mendeleev.s Periodic Table were resolved in the Modern Periodic Table as follows:
a) Mendeléey.s Periodic Table is based on atomic mass while the Modern Periodic Table is based on atomic number. Atomic number is different for different elements and increases steadily by one from element to element unlike atomic mass. All the physical and chomical properties of elements are decided by their atomic number rather than atomic mass. Thus, Modern Periodic Table is more accurate.
b] In Mendeleev.s Periodic Table, hydrogen could not be allotted a fixed position since it showed properties similar to both alkali metals and halogens. In the Modern Periodic Table, this anomaly is resolved by placing hydrogen in the top left corner separately since it has special properties that are not found in any other element.
c] In Mendeléev.s Periodic Table, isotopes of an element (same chemical properties) could not be placed in the same position since they have different atomic masses. But in the Modern Periodic Table, isotopes (same atomic number) can be placed in the same position.
d] In Mendeléev.s Periodic Table, elements with higher atomic masses were placed before elements with lower atomic masses at some places so that elements with similar properties could be grouped together. This violated the periodic law. In the Modern Periodic Table, elements could be arranged in the increasing order of their atomic numbers without any such inconsistencies.