The outermost electronic configuration of the most electronegative element is :

1.	\(ns^2,np^3\)	2.	\(ns^2,np^6n-1d^5\)
3.	\(ns^2,np^5\)	4.	\(ns^2,np^6 \)

The increasing order of non-metallic character of the elements N, P, O, and S is: 

1. P < S < N < O

2. O < S < N < P 

3. O < N < S < P 

4. N < S < O < P

The atomic species that has the maximum ionization energy is : 

Identify the INCORRECT match.

The correct order of metallic character of elements B, Al, Mg and K  is :

Considering the elements B, C, N, F, and Si; the correct order of their non-metallic character is :

The correctly matched option is:-

1. ${\mathrm{Fe}}^{+3}>{\mathrm{Fe}}^{+2}$ $>$ ${\mathrm{Fe}}^{+}$  : Order of atomic radius 

2. O > C > B > N   : Order of ionisation energy 

3. ${\mathrm{O}}^{-2}$ $<{\mathrm{O}}^{-}$ $<\mathrm{O}$ $<{\mathrm{O}}^{+}$ :  Increasing order of Z_eff

4. O < N < F < Ne  :  Order of electron affinity

Percentage ionic character, if electronegativity value of X=2.1 & Y=3.0, is :-

The group of metals having positive value of electron gain enthalpy is :-

The total number of 3rd period elements with more than one electron in a 3d orbital is: