Which of the following is not a representative element?

1.	Tellurium	2.	Tantalum
3.	Thallium	4.	Astatine

The period number and group number of "Tantalum" (Z=73) are respectively :

Consider the following electronic configuration of an element (P) :

$\left[\mathrm{Xe}\right]4{\mathrm{f}}^{14}5{\mathrm{d}}^{1}6{\mathrm{s}}^2$

The correct statement about element 'P' is :

1. It belongs to the 6th period and the 1st group.

2. It belongs to the 6th period and the 2nd group.

3. It belongs to the 6th period and the 3rd group.

4. None of the above.

Which of the following statements is correct regarding the element Unununium?

1. It is an inner transition element.

2. It belongs to the 8th period in the periodic table.

3. It is a transition element.

4. It is a non-transition element.

Consider the following periodic properties:

(i) Atomic radius
(ii) Electronegativity
(iii) Ionisation energy
(iv) Metallic character
Which of these properties decrease from left to right across a period and increase from top to bottom down a group?

The radius of which ion is closest to that of $L{i}^{+}$ ion ?

1. $N{a}^{+}$                                       

2. $B{e}^{2+}$

3. $M{g}^{2+}$                                       

4. $A{l}^{3+}$

The process that requires absorption of energy is:

1. $N\to N^{-}$                       

2. $F\to F^{-}$

3. $Cl\to C{l}^{-}$                     

4. $H\to H^{-}$

In alkaline earth metals, the properties, among the following, that will increase from Be to Ba are:

(i) Atomic radius
(ii) Ionisation energy
(iii) Nuclear charge

First three ionisation energies (in kJ/mol) of three representative elements are given below:

Element     $I{E}_1$                    $I{E}_2$                   $I{E}_3$

P               495.8                4562                  6910
Q               737.7               1451                   7733
R               577.5                1817                  2745

Then incorrect option is :

1. Q: Alkaline earth metal.

2. P: Alkali metal.

3. R: s-block element.

4. All three: P,Q & R belong to the same period.

If the ionization enthalpy and negative electron gain enthalpy of an element are 275 and 86 kcal $mo{l}^{-1}$ respectively, then the electronegativity of the element on the Pauling scale is:

1. 2.8                                     

2. 0.0

3. 4.0                                     

4. 2.6