Question

Match the following elements from Mendeleev's periodic table to their names in the modern periodic table.

• A. Gallium
• B. Scandium
• C. Germanium

Answer 1

Mendeleev predicted that the properties of the three unknown elements, namely eka-boron, eka-aluminium, and eka-silicon were similar to that of boron, aluminium, and silicon. These elements were later discovered and named as scandium, gallium, and germanium, respectively.