The properties of eka-boron predicted by Mendeleev have similar properties to the element _______, which was discovered later.

Scandium

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Germanium

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Gallium

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Aluminium

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Solution

The correct option is A

Scandium

Mendeleev predicted the properties of few elements which were even discovered at that time. He left a few gaps in his periodic table. Mendeleev named them by prefixing a Sanskrit numeral, Eka to the name of preceding element in the same group.
He named one of the element as eka-boron which has very similar properties to scandium.

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Similar questions

Q. (a) How do the properties of eka-aluminium element predicted by Mendeleev compare with the actual properties of gallium element? Expalin your answer.
(b) What names were given by Mendeleev to the then undiscovered elements (i) scandium (ii) gallium, and (iii) germanium?

Q. The element "Eka-aluminium" predicted by Mendeleev was later discovered as

The three elements predicted by Mendeleev from the gaps in his periodic table were known as eka-boron, eka-aluminium and eka-silicon. What names were given to these elements when they were discovered later on?

Q. Gallium and germanium (discovered later) are placed below aluminium and silicon in their respective groups. The names of Gallium and Germanium as given by Mendeleev are Eka-aluminium and Eka-silicon.

Q. Eka-silicon was the name given by Mendeleev to the element similar to ________ in properties.

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