Final answer:
KBr (Potassium Bromide) contains ionic bonds which involve the transfer of electrons from one atom to another, resulting in the formation of ions that are held together by electrostatic forces.
Step-by-step explanation:
The substance that contains bonds involving the transfer of electrons from one atom to another is KBr (Potassium Bromide). This type of bonding is referred to as ionic bonding. In KBr, the potassium (K) atom transfers an electron to the bromine (Br) atom, resulting in the formation of potassium cations (K+) and bromide anions (Br-), which are held together by electrostatic forces in a solid crystal lattice.
In contrast, CO₂ (Carbon Dioxide), NH₃ (Ammonia), and Cl₂ (Chlorine gas) involve covalent bonding. Covalent bonds occur when two or more atoms share electrons to complete their valence shell rather than transferring electrons. For example, Cl₂ is a diatomic molecule with a pure covalent bond since both chlorine atoms share electrons equally.