Match List – $I$ with List – $II$

List – $I$ (Element, Atomic number)	List – $II$ (Position in periodic table)
$(a)$ $Ra$ – $88$	$(i)$ $4^{th}$ period, $13^{th}$ group
$(b)$ $Ga$ – $31$	(ii) $6^{th}$ period, $6^{th}$ group
$(c)$ $W$ – $74$	(iii) $5^{th}$ period, $10^{th}$ group
$(d)$ $Pd$ – $46$	(iv) $7^{th}$ period, $2^{nd}$ group

Which of the following sequences represents the atomic numbers of only representative elements?

Consider the following elements arranged in a periodic table segment as shown in the image.
Which of the following is/are true about $A^{\prime}, B^{\prime}, C^{\prime}$ and $D^{\prime}$?
$A$. Order of atomic radii: $B^{\prime} < A^{\prime} < D^{\prime} < C^{\prime}$
$B$. Order of metallic character: $B^{\prime} < A^{\prime} < D^{\prime} < C^{\prime}$
$C$. Size of the element: $D^{\prime} < C^{\prime} < B^{\prime} < A^{\prime}$
$D$. Order of ionic radii: $B^{\prime+} < A^{\prime+} < D^{\prime+} < C^{\prime+}$
Choose the correct answer from the options given below:

The ionisation enthalpies of elements of the second period are given below: Ionisation enthalpy / $kcal \, mol^{-1}$: $520, 899, 801, 1086, 1402, 1314, 1681, 2080$. Match the correct enthalpy with the elements and complete the graph given in Fig. Also,write the symbols of the elements with their atomic numbers.

Which element among the following is most probable to have the following values?
$\Delta_i H_1 = 419 \ kJ \ mol^{-1}$
$\Delta_i H_2 = 3051 \ kJ \ mol^{-1}$
$\Delta_{eg} H = -48 \ kJ \ mol^{-1}$

The number of the following pairs of elements which exhibit a diagonal relationship is:
$1. B \text{ and } Si$
$2. Be \text{ and } Al$
$3. Li \text{ and } Mg$
$4. Al \text{ and } S$