If the electronic configuration of an element is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}3{\mathrm{d}}^{2}4{\mathrm{s}}^2$, the four electrons that participate in the chemical bond formation will be from :

The electronic configurations of the elements A, B, and C are given below.

$\mathrm{A}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>1{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{p}}^6$
$\mathrm{B}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>1{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{p}}^6<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>3{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>3{\mathrm{p}}^3$
$\mathrm{C}<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>1{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{p}}^6<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>3{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>3{\mathrm{p}}^5$

The stable form of A may be represented by the formula:

The electronic configurations of the elements A, B, and C are given below.

$\mathrm{A}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>1{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{p}}^6$
$\mathrm{B}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>1{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{p}}^6<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>3{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>3{\mathrm{p}}^3$
$\mathrm{C}<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>1{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2{\mathrm{p}}^6<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>3{\mathrm{s}}^2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>3{\mathrm{p}}^5$

The bond between B and C will be : 

Which among the following is the most covalent compound?

The correct order of covalent bond character among
LiCl, BeCl₂, BCl₃ and CCl₄, is:

1. LiCl < BeCl₂ > BCl₃ > CCl₄

2. LiCl > BeCl₂ < BCl₃ < CCl₄

3. LiCl < BeCl₂ < BCl₃ < CCl₄

4. LiCl > BeCl₂ > BCl₃ > CCl₄

Among the following, the maximum covalent character is shown by which compound:

1. ${\mathrm{MgCl}}_2$

2.$$ ${\mathrm{FeCl}}_2$

3. ${\mathrm{AlCl}}_3$

4. ${\mathrm{SnCl}}_2$

The following graph captures potential energy on the y-axis for hydrogen gas formation as a function of the internuclear distance on the x-axis:
        
The bond energy of H₂ can be represented by:

Which of the following atomic orbitals would have the greatest overlap to form the strongest covalent bond?