Which one of the elements has the highest ionization energy?

1. [Ne]3s²3p¹

2. [Ne]3s²3p²

3. [Ne]3s²3p³

4. [Ar]3d¹⁰4s²4p²

 

Element/Ion that has the highest electron affinity is:

The correct order of second ionisation energies of B, C, N, & O is

1. O > N > C > B

2. O > C > N > B

3. O > B > C > N

4. O > N >B > C

An atom of the element A has 3 electrons in its outermost shell while another atom X has 6 electrons in its outermost shell. The formula of the compound between A and X could be.

1. A₂X₃

2. AX₃

3. A₃X₂

4. A₂X

Match List-I with List-II and select the correct answer using codes given below:

How does the shielding (screening) effect of d-electrons compare with that of p-electrons?

1. Equal to that of p-electrons

2. Much greater than that of p-electrons

3. Same as that of f-electrons

4. Less than that of p-electrons

Values of electronegativity like 3.0, 2.8, 2.5 are related to :-

(1) Elements having low IP in the periodic table

(2) Elements having high EA in the periodic table

(3) Chalcogens

(4) None of the above

Allred Rochow's scale is related to:
 

1. Electronegativity, radius, and Z^*

2. Resonance energy of the molecule, ionisation potential and electron affinity.

3. Bond Polarity, diagonal relationship and periodicity.

4. None of the above.

In scandium series, maximum distance between neutrons containing site and valence shell is of :-

1. Sc

2. Mn

3. Fe

4. Zn

Which of the following ionisation energy order is NOT correct :

1. Cu⁺ > Cu⁺²

2. Mn⁺² > Mn⁺³

${\mathrm{3.\; N}}^{+}$< ${\mathrm{N}}^{}$

4. All of the above