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Classification of Elements and Periodicity in Properties
Using the periodic table predicts the formulae of compounds which might be formed by the following pairs of elements:
(a) Silicon and bromine.
(b) Aluminium and sulphur.
(a) Silicon belongs to group 14 with a valence of 4. Bromine being halogen belongs to group 17 with a valence of 1. Hence the formula of the compound formed would be SiBr4.
(b) Aluminium is group 13 element with a valence of 3. Sulphur belongs to group 16 elements with a valence of 1. Hence the formula of the compound formed would be Al2S3.
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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?
What is the name given to the s-block elements?
To which block the element with outer electronic configuration 4s23d10 belongs?
Why are there 10 elements in each series of d-block?
In terms of electronic configuration,
what is common in a given period and group?
Give the general electronic configuration of
(i) Transition elements (ii) Inner transition elements.
Name the group and period to which an element with Z = 15 belongs ?
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