Question:
Mendeleev called the undiscovered element after aluminium at his time as Eka-aluminium. What is the present name of the element after its discovery?
Mendeleev called the undiscovered element after aluminium at his time as Eka-aluminium. What is the present name of the element after its discovery?
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A useful mnemonic is Scab, Gag, Gis:
Scandium-Boron, Gallium-Aluminium, Germanium-Silicon.
Scandium-Boron, Gallium-Aluminium, Germanium-Silicon.
Updated On: Apr 29, 2026
- Germanium
- Indium
- Thallium
- Molybdenum
- Gallium
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The Correct Option is
Solution and Explanation
Step 1: Understanding the Concept:
Mendeleev, while constructing his Periodic Table, left gaps for elements that were not yet discovered.
He predicted their properties and used the prefix "Eka" (Sanskrit for "one") followed by the name of the element above the gap in the same group.
Step 3: Detailed Explanation:
The elements predicted by Mendeleev and their later discoveries are:
1. Eka-boron: Discovered as Scandium (Sc).
2. Eka-aluminium: Discovered as Gallium (Ga).
3. Eka-silicon: Discovered as Germanium (Ge).
As the question asks for the element following Aluminium (Eka-aluminium), the answer is Gallium.
Step 4: Final Answer:
The modern name for Eka-aluminium is Gallium.
Mendeleev, while constructing his Periodic Table, left gaps for elements that were not yet discovered.
He predicted their properties and used the prefix "Eka" (Sanskrit for "one") followed by the name of the element above the gap in the same group.
Step 3: Detailed Explanation:
The elements predicted by Mendeleev and their later discoveries are:
1. Eka-boron: Discovered as Scandium (Sc).
2. Eka-aluminium: Discovered as Gallium (Ga).
3. Eka-silicon: Discovered as Germanium (Ge).
As the question asks for the element following Aluminium (Eka-aluminium), the answer is Gallium.
Step 4: Final Answer:
The modern name for Eka-aluminium is Gallium.
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