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How Do the Properties of Eka-aluminium Element Predicted by Mendeleev Compare with the Actual Properties of Gallium Element? - CBSE Class 10 - Science

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Question

How do the properties of eka-aluminium element predicted by Mendeleev compare with the actual properties of gallium element?

Solution

The properties of eka-alumiunium, predicted by Mendeleev, which was undiscovered then, were almost similar to the actual properties of the element discovered later on. The comparison table below shows the similarities in the properties of the undiscovered element then and the actual element (Gallium).

Property Eka-Aluminium Gallium
Atomic Mass 68 69.7
Density 5.9g/cm3 5.94g/cm3
Melting point low 30.2oC (low)
Formula of oxide Ea2O3 Ga2O3
Formula of chloride EaCl3 GaCl3

 

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APPEARS IN

 Lakhmir Singh Solution for Chemistry for Class 10 (2019 Exam) (2018 to Current)
Chapter 5: Periodic Classification Of Elements
Q: 26.1 | Page no. 283
Solution How Do the Properties of Eka-aluminium Element Predicted by Mendeleev Compare with the Actual Properties of Gallium Element? Concept: Achievements of Mendeleev’s Periodic Table.
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