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What is the basic theme of organisation in the periodic table?
Which important property did Mendeleev use to classify the elements in his periodic table and did he stick to that?
Describe the two merits of long form periodic table over the Mendeleev's periodic table?
Mendeleev arranged elements in his periodic table in the order of increasing
The element 'eka-aluminium' predicted by Mendeleev was later discovered as
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