(N/A) The long form of the periodic table is superior to Mendeleev's periodic table because it classifies elements based on the electronic configuration of atoms rather than atomic mass.
Key characteristics include:
$(i)$ The table consists of $18$ vertical columns (groups) and $7$ horizontal rows (periods).
$(ii)$ It eliminates the anomalies of Mendeleev's table,such as the position of isotopes and the placement of elements with higher atomic mass before those with lower atomic mass.
$(iii)$ Elements are categorized into $s, p, d,$ and $f$-blocks based on the orbital being filled,which provides a clear relationship between electronic structure and chemical properties.
$(iv)$ It provides a systematic arrangement of transition elements (d-block) and inner transition elements (lanthanides and actinides),which were poorly organized in Mendeleev's table.
$(v)$ Periodic trends in properties like atomic radius,ionization enthalpy,and electronegativity are more clearly explained through the modern periodic law.