What is the difference between sodium atom and sodium ion?

By means of simple diagram explain the formation of sodium chloride.

By means of simple diagrams explain the formation of carbon tetrachloride.

If $\mathrm{A},\mathrm{B},\mathrm{C}$ and $\mathrm{D}$ are elements given that $\mathrm{B}$ is an inert gas (not helium)

What type of bonding would take place between (i) $\mathrm{A}$ and $\mathrm{C}$ and (ii) $\mathrm{D}$ and $\mathrm{A}$.

Draw diagram to illustrate the structure of molecule of Ammonia. 

The distribution of electrons in the atoms of three elements is given below:

For answering the following questions you are not required to identify the atoms. You may use the letters $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ as symbols for the elements. In each case given below state whether the bonding is ionic or covalent and give the formula of the molecules of the compound so formed.

(a) Between two atoms of $\mathrm{X}$.

(b) Between the atom of  $\mathrm{X}$ and the atom of $\mathrm{Z}$.

(c) Between the atom of $\mathrm{Y}$ and the atom of $\mathrm{Z}$.

Complete the following statements:

(a) The bond which is formed by transfer of an electron from one atom $\text{'}\mathrm{A}\text{'}$ to another atom $\text{'}\mathrm{B}\text{'}$ is called _______.

(b) The atoms $\mathrm{A}$ and $\mathrm{B}$ become ions. Thus, $\mathrm{A}-2{\mathrm{e}}^{-}=$______ and $\mathrm{B}+{\mathrm{e}}^{-}=$_______.

(c) The formula of the compound is _____.