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Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements2 Marks
Question
How do the properties of eka - aluminium element predicted by Mendeleev compare with the actual properties of gallium element? Explain your answer.
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Answer

Eka - aluminium and gallium are the two names of the same element as Eka - Aluminum has almost exactly the same properties as the actual properties of the gallium element. The properties: atomic mass, density, melting point, formula of chloride and formula of oxide are almost the same.

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