Valency of an element is defined as the combining power of element. As, the number of electrons gained or lost or shared with other atoms in the formation of compounds.
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Which important property did Mendeleev use to classify the elements in his periodic table?
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How many elements are present in: (i) second period (ii) fourth period (iii) sixth period?
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Which property is the basis of long form of periodic table?
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Give the ‘liquid elements’ in the periodic table.
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What are magic numbers?
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What are typical elements?
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How many elements are placed in each period of the p-block?
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What is the number of groups in: (i) p-block (ii) d-block?
