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Classification of Elements and Periodicity in Properties
Predict the formulae of the stable binary compounds that would be formed by the following pairs of elements:
silicon and oxygen
Silicon belongs to group 14 with a valence of 4. Oxygen belongs to group 16 elements with a valence of 2. Hence the formula of the compound formed would be SiO2.
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Give the ‘liquid elements’ in the periodic table.
What is valency of an element?
Gallium was named by Mendeleev as
What are magic numbers?
Which property is the basis of long form of periodic table?
How many elements are placed in each period of the p-block?
What is the number of groups in: (i) p-block (ii) d-block?
How many elements are present in:
(i) second period
(ii) fourth period
(iii) sixth period?
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