Chapter 8, Problem 130A

Interpretation Introduction

Interpretation:

The number of shared electrons and group of atoms which form single, double and triple covalent bonds needs to be determined.

Concept introduction:

In covalent compounds, atoms are bonded with covalent bonds which are formed by equal sharing of electrons. The valence electrons involve in the covalent bond formation and formation of covalent bond provides the octet configuration to the bonded atoms.

Answer to Problem 130A

Type of covalent bond	Number of shared electrons	Group number
Single	2	Group-17
Double	4	Group-16
Triple	6	Group-15

Explanation of Solution

Since each chemical bond is formed by 2 electrons therefore:

Type of covalent bond	Number of shared electrons
Single	2
Double	4
Triple	6

The atoms which involves in the single, double and triple covalent bonds must have group-15, 16 and 17. As group-17 elements have 7 valence electrons so they need one more electron to get octet therefore they must form single covalent bond whereas group-16 elements have 6 valence electrons and need 2 more electrons to get octet. The group-15 elements have 5 valence electrons and need 3 more electrons to get octet configuration.

Type of covalent bond	Number of shared electrons	Group number
Single	2	Group-17
Double	4	Group-16
Triple	6	Group-15

Conclusion

Thus,

Type of covalent bond	Number of shared electrons	Group number
Single	2	Group-17
Double	4	Group-16
Triple	6	Group-15