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Question

1) On the Pauling's electronegativity scale,which element is next to F.
2) Why Ca2+ has smaller ionic radius than K+?

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Solution

(1)Generally atomic Radius decreases
Ionisation energy Incomes and then
electronegativity Incomes.
on Pauling's electronegativity
scale O2 (oxygen) is next to F
F3.98
O3.44 EN
(2) In Ca2+. the number of profanes in
the numbers of the ions is Increasing
That tend to pull the electrons
more and more towards the center
of ion causing ionic radii to fall
as compared to K
k+>Ca2+: fonic Radii

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