Chapter 12, Problem 5A

Interpretation Introduction

Interpretation:

The bonding between given compounds are to be compared.

Concept introduction:

Chemical bond is of three types:

• Ionic bond
• Covalent bond

Ionic bonds are formed when there is complete transfer of electrons from one atom to another forming the bonds.

Covalent bond is formed by sharing of electrons between the atoms forming the bonds

Polar covalent bond is formed between two different atoms.

Non-polar covalent bond is between two same atoms.

Answer to Problem 5A

  $H_2$ has pure covalent bond between hydrogen atoms.

  $HF$ has polar covalent bond between the atoms.

  $NaF$ has ionic bond between the atoms.

Explanation of Solution

In $NaF$ sodium is metal and fluorine is non-metal. So the bond formed is ionic where in $H_2$ and $HF$ the bond is formed between non- metals so it is covalent bond.

Conclusion

Thus, $H_2$ has pure covalent bond between hydrogen atoms.

  $HF$ has polar covalent bond between the atoms.

  $NaF$ has ionic bond between the atoms.