question_answer 107)

    Write the formulae of chlorides of Eka-silicon and Eka-aluminium, the elements predicted by Mendeleev.

Answer:

                  Eka-silicon is germanium (Ge). It lies in group4 of the Mendeleev's periodic table and thus, has a valency of 4. The formula of its chloride is GeCl4. Eka-aluminium is gallium (Ga). It lies in group3 of the Mendeleev's periodic table and thus, has a valency or 3. The formula of its chloride is GaCl3.