Chemistry · Classification of Elements and Periodicity in Properties
हिन्दीMendeleev left several gaps in his periodic table for undiscovered elements. The elements predicted below aluminum and silicon were respectively designated as:
Correct answer · Option 2
Eka-aluminium and Eka-silicon
Explanation
Mendeleev predicted the properties of undiscovered elements below aluminum and silicon, naming them Eka-aluminium (gallium) and Eka-silicon (germanium) respectively.