Question

Write a formula of chlorides of Eka-silicon, Eka-aluminium, the elements predicted by Mendeleev .

Answer 1

Eka silicon is Germanium (GeCl4)

Eka Aluminium is Gallium (GaCl3)

Answer 2

Eka-silicon chloride: GeCl_{4}; Eka-aluminium: GaCl_{3}

Explanation:

In Mendeleev's periodic table, published in the year 1869, there were some elements which were not yet discovered. Mendeleev had given them names based on the similarity of chemical characteristics to other elements namely: boron, silicon, and aluminium; he had called them Eka-boron, Eka-silicon, and Eka-aluminium respectively.

Later when these elements were discovered their names were changed as follows:

• Eka-silicon to germanium
• Eka-aluminium to gallium

Thus, their chlorides would be called germanium chloride (GeCl_{4}) and gallium chloride (GaCl_{3}).