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. 

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 _____.

The following tables give information about the properties of some chemicals.

The properties listed are the ability of the chemical to conduct electricity as a solid, as a liquid (i.e., molten), as a solution in water. The melting point of each chemical is given in the fifth column.
Study the above table carefully and then answer the questions below. Use the letters given in the first column of the table to indicate your choice.

(a) Which of the above chemicals could be a metal?

(b) Which chemicals have a molecular structure?

(c) Which chemicals seem to change from molecular structure to ions when dissolved?

(d) Which chemicals could be definitely not be an element?

How do metals differ from non-metals in chemical nature of their oxides.