* Chemical Properties: These describe how a substance reacts with other substances or how it changes its composition. They are observed during a chemical reaction.

* Burning Hydrogen: When hydrogen burns, it reacts with oxygen in the air to produce water (H₂O). This is a chemical reaction where the composition of the hydrogen changes.

Here's a breakdown:

* Starting materials: Hydrogen gas (H₂) and oxygen gas (O₂)

* Chemical change: Hydrogen reacts with oxygen, forming water (H₂O). This is a chemical reaction because new substances are formed.

* Result: Water is produced, and energy is released in the form of heat and light.

Therefore, the ability of hydrogen to burn and react with oxygen is a chemical property.