Which of the following orders is incorrect?

As we go from left to right in period $2$ of the periodic table,the gram atomic volume of the elements:

Fill in the blanks:
$(i)$ Atoms and ions having the same number of electrons are known as ........... .
$(ii)$ The quantitative measure of the tendency of an element to lose an electron is called ........... .
$(iii)$ The screening effect is also known by the name ........... .
$(iv)$ The enthalpy change when a gaseous neutral atom forms a negative ion is called ........... .

Which one of the following sets of ions represents a collection of isoelectronic species?

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.

Match the column-$I$ with column-$II$

$A. S \rightarrow S^{-}$	$P. \text{Endothermic process}$
$B. N^{-} \rightarrow N$	$Q. \text{Exothermic process}$
$C. O^{-} \rightarrow O^{2-}$	$R. \text{Inert gas configuration in product}$
$D. P \rightarrow P^{-}$	$S. \text{Half filled configuration in product}$

Correct match is $:-$