Here's why:
* Hydrogen is highly flammable: This means it reacts readily with oxygen in the air, producing a rapid combustion reaction.
* The toothpick provides the ignition source: The flame from the toothpick provides the necessary energy to initiate the reaction between hydrogen and oxygen.
* The reaction creates a flame: The rapid combustion of hydrogen produces a flame, which is the visible evidence of the chemical reaction.
Important Note: This experiment should only be performed under strict safety conditions and supervision. Hydrogen gas is highly flammable and can be explosive in certain conditions.
