Question

Eka-silicon was used for _____ discovered later.

• A. germanium
• B. gallium

Answer 1

Mendeleev left some space in periodic table for the undiscovered elements. Later he discovered some elements and predicted those elements should be placed in periodic table.

Eka-silicon is one such element which is later named as germanium and belongs to group 14 in periodic table.

Final answer:

Eka-silicon was used for Germanium discovered later.