* Oxygen (O2): Oxygen itself is not combustible. It's a powerful oxidizer, meaning it supports combustion. Think of it as the fuel for fire, not the fire itself.
* Hydrogen (H2): Hydrogen is highly combustible. It burns very readily and produces a lot of heat. In fact, hydrogen is considered the most flammable element. It's often used as a fuel source.
* Water (H2O): Water is non-combustible. It's actually used to extinguish fires because it absorbs heat and prevents oxygen from reaching the fuel source.
In summary:
* Oxygen is the fuel for fire, not the fire itself.
* Hydrogen is highly flammable.
* Water is non-flammable and used to put out fires.
