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Which one of the following ionic species has the greatest proton affinity to form stable compound?
Proton affinity decreases in moving across the period from left to right due to increase in charge, within a group the proton affinities decreases from top to bottom. Nitrogen family > Oxygen family > Halogens.
Identify the correct order of the size of the following:
For isoelectronic species, size of anion increases as negative charge increases whereas size of cation decreases with increase in positive charge. Further ionic radii of anions is more than that of cations. Thus the correct order is Ca++ < K+ < Ar < Cl- < S--
Which of the following properties of elements does not exhibit the periodicity ?
In general, the ionization potentials of elements decreases as one proceeds in the periodic table
Correct order of polarising power is
The first ionization potential of Na, Mg, Al and Si are in the order
Which of the following cations acts as an oxidizing agent?
Tl shows the inert pair effect. Hence Tl+ oxidation state is more stable than Tl3+.