The position of certain elements in the Modern Periodic Table are shown below.** Using the above table answer the following questions giving reasons in each case :(i) Which element will form only covalent compounds?(ii) Which element is a non-metal with valency 2 ?(iii) Which element is a metal with valency 2 ?(iv) Out of $\mathrm{H}, \mathrm{C}$ and $\mathrm{F}$ which has largest atomic size ?(v) To which family does $\mathrm{H}, \mathrm{C}$ and $\mathrm{F}$ belong?ORDefine atomic size. Give its unit of measurement. In the modern periodic table what trend is observed in the atomic radius in a group and a period and why is it so ?