Arrange as directed :
Na (11), K (19), Li (3), Rb (37) belonging to Group 1 of the long periodic table according to decreasing order of atomic radius.

Arrange as directed : S (16), O4(8),Te (52), Se ,(34) belonging to Group 16 of the long periodic tables according to increasing order of electronegativity.

Arrange the increasing order of atomic radii Li, Na, K.

Arrange the elements in increasing order of atomic radius Na , Rb , K , Mg

Arrange the following elements in decreasing order of their atomic radius: Na, H, Si, S, P, Cl

On the basis of atomic number and position in the periodic table arrange the following elements in decreasing order of their metallic character Si, Na, Mg, P, Be.

(i) The electronic configuration of an atom is [Z](n-2) f^(14)(n-1)d^(1)ns^(2) . What is the minimum position of the atom in the periodic table and correspondingly what is the atomic number of Z? (ii) Find the number of unpaired electrons in the atom of the element having atomic number 16. (iii) Which of the following ions does not obey Bohr's atomic theory? He^(2+),Li^(2+),B^(3+),Be^(3+) .

Which arrangement of the following set of atoms is in order of increasing atomic radius: Na, Rb, K and Mg ,

The long form of the periodic table is constructed on the basis of repeating electronic …………….. of the atoms when they are arranged in the order of increasing atomic numbers.

The E^(0) value for Cl_2//Cl^(-) is + 1.36, for I_2//I^(-) is +0.53V, for Ag^(+)//Ag is + 0.79V, for Na^(+)//Na is - 2.71V and for Li^(+)//Li si -3.04 V. Arrange the following atoms and ions in decreasing order of their reducing strength: I^(-), Ag, Cl^(-), Li, Na

Arrange according to the instructions given the in the bracker: (1) O, Te, Se, S (Increasing order of electronegativity), (2) Na, Cu, Zn (Increasing order of electropositive character), (3) I, F, Br, Cl (Increasing order of metallic character).