Hydrogen is an element; it exists naturally as a molecule. Each hydrogen molecule is made up of two hydrogen atoms. In hydrogen cars hydrogen reacts with oxygen in a fuel cell, making electricity ...

Keep a bottle in every room of your house to whiten teeth, clean mirrors, prevent stains, and more. The post 17 Hydrogen ...

Electrolysis, where hydrogen is liberated from water with oxygen as a byproduct, is well understood but more expensive than ...