Hydrogen

Hydrogen is a gas that you can't see, smell or taste. It is a small and simple molecule that contains only one proton and one electron. It's the lightest gas in the universe! It is present in many things such as water, stars, and even in our bodies.

Hydrogen is important for many reasons, one of which is that it can be used for fuel. When hydrogen reacts with oxygen - another gas - it creates water and energy that can be used to power things like cars, homes and even entire cities.

Hydrogen is also used in many industrial processes, for example, in making chemicals such as ammonia and methanol, refining oil, and producing metals like steel. It can also be used to help make food and medicines.

In conclusion, hydrogen is a tiny gas that can be used for energy, making chemicals, and in many things we use every day!