Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the difference between a single bond and a double bond in chemistry?

### Response:
A single bond is a covalent bond consisting of one shared pair of electrons between two atoms, while a double bond consists of two shared pairs of electrons between two atoms. Single bonds are weaker than double bonds, which allows for different chemical reactions to take place.