Arrange the following in order of increasing radii: (a)N,O,P (b)Mg+, mg, mg2+ (c)cl-, cl
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The order of increasing radii is given as:
(a) O < N < P
- The covalent radius of O is 66 pm, of N is 70 pm and that of P is 110 pm.
(b) Mg²⁺ < Mg⁺ < Mg
- The ionic radius of a cation is smaller than the parent atom due to relatively more charge in the nucleus.
- Hence, Mg²⁺ has the smallest radius, Mg⁺ has more than Mg²⁺ and Mg has the largest radius.
(c) Cl < Cl⁻
- The ionic radius of an anion is larger than the parent atom due to the repulsion due to excess electrons.
- Hence, Cl⁻ has a bigger radius as compared to Cl.
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