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Mendeleev named certain undiscovered ele...

Mendeleev named certain undiscovered elements as eka boron and eka aluminimum which when later discovered were called ________and ___________

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To answer the question regarding the undiscovered elements named by Mendeleev as eka-boron and eka-aluminum, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Mendeleev's Contribution**: Mendeleev was a chemist who created one of the first periodic tables. He arranged elements based on their atomic mass and noticed gaps for undiscovered elements. 2. **Identifying the Names Given by Mendeleev**: Mendeleev named certain undiscovered elements based on their position in the periodic table. The term "eka" means "one" in Sanskrit, indicating that these elements were one place below boron and aluminum in the periodic table. 3. **Determining the Elements Corresponding to eka-boron and eka-aluminum**: - **Eka-boron**: This element was later discovered and is known as **Scandium** (Sc). - **Eka-aluminum**: This element was later discovered and is known as **Gallium** (Ga). 4. **Final Answer**: Therefore, the undiscovered elements named by Mendeleev as eka-boron and eka-aluminum are **Scandium** and **Gallium**, respectively. ### Final Answer: Eka-boron is known as **Scandium** and eka-aluminum is known as **Gallium**. ---
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