Name unknown elements at the time of Mendeleef
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the unknown element at the time of mendeleef are ekasilica and ekaboron
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Mendeleev's periodic table could predict the properties of several elements on the basis of their positions in periodic table.
The name of undiscovered elements are :
Eka Boron
Eka Aluminum
Eka Silicon
Eka in sanskrit " means first " that means first comes the element Boron and then the undiscovered element.
Later they were discovered as
Eka Boron --- scandium
Eka Aluminum---- gallium
Eka Silicon- germanium
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