Mendeleev predicted the existence of which element/elements in the periodic table?

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Solution

Understanding the Mendeleev's Periodic Table:
Mendeleev's Periodic table was created in 1869 and at that time only 63 elements were made.
He kept vacant spaces for several elements to be added as soon as they are discovered.
Eka Silicon or Germanium and Eka Aluminum or Gallium are two such elements.

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Similar questions

Mendeleev predicted the existence of certain elements not known at that time and named two of them as eka-aluminium, and eka-silicon.

(a) Name the element which has taken the place of (i) eka-aluminium and (ii) eka-silicon

(b) Mention the period/periods of these elements in the modern periodic table.

(d) Classify these elements as metals, non-metals or metalloids.

(e) How many valence electrons are present in the atoms of each of these elements?

Mendeleev predicted the existence of which element/elements in the periodic table?

Mendeleev predicted the existence of few undiscovered elements based on his periodic table.

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