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Vikas Yadav
Sep 5, 20201 min read
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (Any two) Solution:...
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Vikas Yadav
Sep 5, 20201 min read
Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements: K,
Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements: K, C, AI, Si, Ba. Solution: K- K2O...
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Vikas Yadav
Sep 5, 20201 min read
What were the limitations of Dobereiner’s classification?
Solution: (i) They were not applicable for very low mass or very high mass elements. (ii) All the elements couldn’t fit into Dobereiner’s...
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Vikas Yadav
Sep 5, 20201 min read
Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.
Solution: Dobereiner’s triads did exist in the columns of Newlands’ Octaves; For example, the elements Lithium (Li), Potassium (K) and...
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