Mendeleev predicted the existence of certain elements not known at that time and named as Eka-aluminiumT he elements which have taken the place of Eka-aluminium is :
A
Germanium
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B
Gallium
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C
Silicon
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D
Aluminium
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Solution
The correct option is B Gallium Eka-silicon means germanium. It occurred because of silicon whereas eka-aluminium occurred because of aluminium and later named it gallium.
While filling the elements considering atomic number would be main and fundamental property there were gaps in the mentioned groups hence he filled them with these names.