To determine which compound among the given options contains an ionic bond, we need to understand the nature of ionic bonds and how they form.
### Explanation of Ionic Bonds:
An ionic bond is formed when one atom donates one or more electrons to another atom, resulting in the formation of ions: cations (positively charged) and anions (negatively charged). This type of bond typically occurs between metals and non-metals.
### Examination of Each Compound:
A. [tex]\( NH_3 \)[/tex] (Ammonia):
- Ammonia is composed of nitrogen and hydrogen.
- Both nitrogen and hydrogen are non-metals.
- Bonds in [tex]\( NH_3 \)[/tex] are covalent, as electrons are shared, not transferred.
B. [tex]\( CCl_4 \)[/tex] (Carbon Tetrachloride):
- This compound is made up of carbon and chlorine, both of which are non-metals.
- The bonds are covalent since the atoms share electrons.
C. [tex]\( KBr \)[/tex] (Potassium Bromide):
- Potassium (K) is a metal, and Bromine (Br) is a non-metal.
- Potassium donates an electron to Bromine, forming [tex]\( K^+ \)[/tex] and [tex]\( Br^- \)[/tex] ions.
- The bond between [tex]\( K^+ \)[/tex] and [tex]\( Br^- \)[/tex] is an ionic bond.
D. [tex]\( CO_2 \)[/tex] (Carbon Dioxide):
- Made of carbon and oxygen, both of which are non-metals.
- The bonds are covalent as electrons are shared between the atoms.
### Conclusion:
Among the given options, only [tex]\( KBr \)[/tex] (Potassium Bromide) contains an ionic bond because it is formed between a metal (potassium) and a non-metal (bromine), resulting in the transfer of electrons and formation of ions.
Therefore, the correct answer is C. [tex]\( KBr \)[/tex].
