Hydrogen's state of matter is gas at standard conditions of temperature and pressure. Hydrogen condenses into a liquid or freezes solid at extremely cold temperatures.
Hydrogen's state of matter can change when the temperature changes, becoming a liquid at temperatures between minus 423.18 and minus 434.49 degrees Fahrenheit. It becomes a solid at temperatures below minus 434.49 F.
Due to its high flammability, hydrogen gas is commonly used in combustion reactions, such as in rocket and automobile fuels. It is also used in the production of fertilizers. Hydrogen is the most commonly found element in the universe, making up 90 percent of all atoms and accounting for 75 percent of all matter by mass.