Question

meendeleev kept some blank spaces
in the periodic table for the elements
that were yet to be discovered.
Name those elements and what
were the names given to them ?​

Answer 1

★Required Answer :

One of the merit of mendeleev's periodic table is , The prediction of some undiscovered elements and their properties and left the certain places (according to their properties) for the undiscovered elements in periodic table. At that time , mendeleev has named the undiscovered elements as eka - Boron , eka - Aluminium , eka - Manganese and eka - Silicon . These Elements were later named as eka - Boron as Scandium , eka - aluminium as Gallium , eka-Manganese as Technetium , eka-Silicon as Germanium .