Hydrogen

Hydrogen was an element on the periodic table with the symbol H (PROSE: ) and atomic number 1. (TV: ) It was the most abundant element in the universe. A hydrogen in-rush was a crucial part of Event One. (TV: )
The Earth's Sun was made up of 74% hydrogen and 24% helium. (AUDIO: )
Hydrogen and oxygen made up H₂O (PROSE: ) or water. (TV: )
The Fourth Doctor suggested energising hydrogen as an alternative power source to the "mineral slime" oil. (TV: )
Hydrogen could be used as a base in the process to form huon particles. (TV: )
The R101 was filled with hydrogen gas. (AUDIO: )
The Skelloids' life cycle relied on the absorption of hydrogen through their gill-plates. Banto Zame, posing as the Doctor, seemingly foiled an invasion of the Generios system by the Skelloids by exploiting this by using his psychic screwdriver to invert the core of their hydrogen stabilisers. In reality, the Skelloid invasion was nothing but a mere holographic illusion created by him. (AUDIO: )
Among other chemicals, the Source contained hydrogen, which helped allow it to act as a terraforming agent. (TV: )
Category:Elements from the real world
Category:Gases
Category:Power sources