Here's why:

* Low boiling point: Hydrogen has a boiling point of -252.87°C (-423.17°F), which is extremely low. This means that it readily turns into a gas at normal temperatures.

* Weak intermolecular forces: Hydrogen molecules have very weak intermolecular forces, making it easy for them to move freely and exist as a gas.

However, hydrogen can exist in other states under different conditions:

* Liquid hydrogen: It can be liquefied at extremely low temperatures (below -252.87°C).

* Solid hydrogen: It can be solidified at even lower temperatures (below -259.1°C).

So, while hydrogen is commonly found as a gas, it can be transformed into a liquid or solid under specific conditions.