Final answer:
Potassium bromide (KBr) is the compound that can most likely be used to treat canine epilepsy due to its anticonvulsant properties.
Step-by-step explanation:
On the basis of periodic properties, the compound that can most likely be used to treat canine epilepsy is potassium bromide (KBr). Potassium bromide is commonly used as an anticonvulsant medication for dogs and other animals. It helps to control seizures by inhibiting electrical activity in the brain.