Mendeleev left gaps for undiscovered elements and predicted their properties. Which of the following — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Mendeleev named undiscovered elements by prefixing a Sanskrit numeral 'Eka' to the name of the preceding element in the same group. The correct matches are: Eka-boron is Scandium ($Sc$), Eka-aluminium is Gallium ($Ga$), Eka-silicon is Germanium ($Ge$), and Eka-manganese is Technetium ($Tc$).