Question

Eka-aluminium and eka-silicon are known as__________.

• A. Gallium and Germanium
• B. Aluminium and Silicon
• C. Iron and Sulphur
• D. Proton and Silicon

Answer 1

Answer: (A)

Gallium and Germanium

The four predicted elements lighter than the rare earth elements, eka-boron, eka-aluminium, eka-manganese, and eka-silicon, proved to be good predictors of the properties of scandium, gallium, technetium and germanium respectively, which each fill the spot in the periodic table assigned by Mendeleev. Mendeleev named these unknown elements using the terms eka, dvi & tri ($1,2$ & $3$ from the ancient Indian language of Sanskrit).