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Which of the following is correct order of atomic radii ?

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Important Questions on Classification of Elements and Periodicity in Properties

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The ionic radii (in  Å) of N3-, O2-  and  F-  are respectively:
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The correct order of the ionic radii of O2-,N3-,F-,Mg2+,Na+ and Al3+ is :
 
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The effective nuclear charge for an electron in n=2 shell in a fluorine atom will be, (calculated according to Slater's rules):
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The ionic radii of O2, F, Na+ and Mg2+ are in the order:
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The correct order of energy of 2s-orbitals in H, Li, Na and K, is
 
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The size of the iso-electronic species Cl- , Ar and Ca2+ is affected by:
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Covalent bond length of a chlorine molecule is 1.98 Ao. Covalent radius (in Ao) of chlorine atom is _________
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The effective nuclear charge of an element with three valence electrons is 2.60 . What is the atomic number of the element?
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Among the isoelectronic ionsO2-, N3-, Mg2+, Na+, the ions with the least and the highest ionic radius are, respectively
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The correct order of ionic size of N3-,Na+,F-,Mg2+ and O2- is : 
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In the elements of the second period of the modern periodic table, the decrease in atomic radius (pm) is maximum with respect to
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Which of the following orders of ionic radii is correctly represented?
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Among the element Li, N, C and Be, one with the largest atomic radius is
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The species Ar, K+ and Ca2+  contain the same number of electrons. In which order do their radii increase?