Class X 6/6

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Sep 5, 20201 min

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...

Sep 5, 20201 min

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...

Sep 5, 20201 min

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...