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What is the correct order of the atomic radii of icosagens considering that the symbols of the name of the respective member of icosagen from top to bottom are represented by A, B, C, D, E?

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Important Questions on Classification of Elements and Periodicity in Properties

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