Q26 of 181 Page 282

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

Eka- Alluminium and Gallium is the same element suggested by Mendeleev. The properties like density, mass, chlorine and oxide formula is almost same of eka alluminium and gallium.


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State the merits of Mendeleev’s classification of elements.

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Describe two anomalies of Mendeleev’s periodic classification of element.

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What names were given by Mendeleev to the then undiscovered elements(i) scandium (ii) gallium, and (iii) germanium ?

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