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Classification of Elements and Periodicity in Properties
Out of P3-, S2- and Cl- ions, which has the smallest value of ionic radius and why?
All these elements are isoelectronic ions i.e. having same number of electrons (18) but their atomic numbers are different. Cl- ion (Atomic number 17) has the maximum effective nuclear charge, therefore, the size of Cl- ion must be the smallest out of the three ions.
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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?
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?
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