Match the following isoelectronic species in column I and column II : 

Column I	Column II
i. ${\mathrm{F}}^{-}$	a. ${\mathrm{Br}}^{-}$
ii. Ar	b.  ${\mathrm{Si}}^{2+}$
iii. $\mathrm{Mg}$	c. ${\mathrm{O}}^{2-}$
iv. ${\mathrm{Rb}}^{+}$	d. ${\mathrm{S}}^{2-}$

 

	i	ii	iii	iv
1.	b	c	a	d
2.	c	b	a	d
3.	c	d	b	a
4.	b	c	d	a

The correct order of ionization energy of W, X, Y and Z is-

Consider the following curve:

   
X represents group with highest atomic radius. The element that belongs to Y group can be : 

In the following graph of variation of ionization energy with atomic number, X, Y, and Z represent elements.

The group number of X, Y, and Z elements is:

The graph between ionization energy and atomic number for
the first group elements is shown below:


    

The element represented by Y in the graph above is -

1. Cs 

2. Rb

3. Ca

4.  K 

Abnormally high ionization enthalpy of B as depicted in the graph below can be due to : 

1. Completely filled 2p subshell.

2. Completely filled 2s subshell.

3. Completely filled 3d subshell.

4. Completely filled 4f subshell.

The correct graph depicting ionization energies for 2^nd period elements is-

1.
2.
3.
4.	None of the above

The incorrect statement about ionization enthalpy is -

The size of isoelectronic species: F^–, Ne and Na⁺, is affected by :

The factor that does not affect the valence electron is: