EVERYDAY SCIENCE

Detailed explanation-1: -One way to predict the type of bond that forms between two elements is to compare the electronegativities of the elements. In general, large differences in electronegativity result in ionic bonds, while smaller differences result in covalent bonds.

Detailed explanation-2: -A covalent bond that has an unequal sharing of electrons, as in part (b) of Figure 4.4. 1, is called a polar covalent bond. A covalent bond that has an equal sharing of electrons (part (a) of Figure 4.4. 1) is called a nonpolar covalent bond.

Detailed explanation-3: -The electronegativities of P and O are 2.2 and 3.5, respectively. Hence, the electronegativity difference between P and O is (3.5-2.2) or 1.3. So, the P-O bond is polar.