Examine the illustration of the chemical bond formation in carbon tetrachloride molecule and answer the questions given below.

• How many pairs of electrons are shared by the carbon atom with each chlorine atom?
• What is the total number of electron pairs shared by the carbon atom with all the chlorine atoms?
• How can we represent the molecule using symbols?

Examples of some covalent compounds are given draw the chemical bonds of the compounds by using electron dot diagram.

${\mathrm{CH}}_4, \mathrm{HF}, {\mathrm{H}}_2\mathrm{O}$

Some compounds and their nature are shown in the table. Complete the table by finding out the electron negativity difference between the constituent elements.

• What is the electronegativity of hydrogen?
• What is the electronegativity of chlorine?
• The atomic nucleus of which of these elements has a greater tendency to attract the shared pair of electrons?