Identify the correct orders regarding atomic radii

(i) $\mathrm{Cl}>\mathrm{F}>\mathrm{Li}$

(ii) $\mathrm{P}>\mathrm{C}>\mathrm{N}$

(iii) $\mathrm{Tm}>\mathrm{Sm}>\mathrm{Eu}$

(iv) $\mathrm{Sr}>\mathrm{Ca}>\mathrm{Mg}$

$$ \text { Match the following } $$

$$ \begin{array}{cccc} \hline & \text { List-I (Elements) } & & \text { List-II (Group) } \\ \hline \text { A } & \mathrm{Mn}, \mathrm{Tc}, \mathrm{Re} & \text { I } & 12 \\ \hline \text { B } & \mathrm{Zn}, \mathrm{Cd}, \mathrm{Hg} & \text { II } & 4 \\ \hline \text { C } & \mathrm{Ti}, \mathrm{Zr}, \mathrm{Hf} & \text { III } & 17 \\ \hline \text { D } & \mathrm{Ga}, \mathrm{In}, \mathrm{Tl} & \text { IV } & 7 \\ \hline & & \text { V } & 13 \\ \hline \end{array} $$

The correct answer is

Match the following

$$ \begin{array}{llll} \hline & \text { List-I (Element) } & & \text { List-II (Block) } \\ \hline \text { (A) } & \mathrm{Cd} & \text { I } & f \text {-block } \\ \hline \text { (B) } & \mathrm{Eu} & \text { II } & s \text {-block } \\ \hline \text { (C) } & \mathrm{Se} & \text { III } & d \text {-block } \\ \hline \text { (D) } & \mathrm{Ba} & \text { IV } & p \text {-block } \\ \hline \end{array} $$

The correct answer is

In long form of periodic table an element ' $E$ ' has atomic number 78 . The period and group number of the element are $x$ and $y$ respectively. $(x+y)$ is equal to