ELI5: Explain Like I'm 5

Chemical weapon

A chemical weapon is a type of weapon that uses chemicals to hurt people or animals. These chemicals can be mixed together to make a gas that can be spread through the air or put into a bomb or missile. Chemical weapons are very dangerous because they can hurt and kill a lot of people at once. They can cause things like burns, breathing problems, and even death. Chemical weapons are very bad and can cause a lot of harm, which is why countries have agreed not to use them.