Helium

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Helium
A periodic table showing He in position 2. (TV: Shada)

Helium was a light element found on Earth (TV: The Robots of Death) with the symbol He on the periodic table. (TV: Shada) It was a gas at room temperature. (TV: The Robots of Death)

The Earth's Sun was made up of 74% hydrogen and 24% helium. (AUDIO: Feast of Fear)

Arcturus's life support system included a helium regenerator, which, if deactivated, he would die. (TV: The Curse of Peladon)

When humans inhaled large quantities of helium, their voices became high-pitched. The Fourth Doctor was able to use his respiratory bypass system to avoid its effects. (TV: The Robots of Death)

Helium 2 had the potential to exist during the Leptonic Era. (TV: Time and the Rani)

At CERN, liquid helium was used to cool superconducting electromagnets in a particle accelerator to -271.3°C. (TV: Extremis)

v • e
Elements
Periodic table
Hydrogen1 • Helium2 • Lithium3 • Beryllium4 • Boron5 • Carbon6 • Nitrogen7 • Oxygen8 • Fluorine9 • Neon10 • Sodium11 • Magnesium12 • Aluminium13 • Silicon14 • Phosphorus15 • Sulphur16 • Chlorine17 • Argon18 • Potassium19 • Calcium20 • Titanium22 • Vanadium23 • Chromium24 • Manganese25 • Iron26 • Nickel28 • Copper29 • Zinc30 • Gallium31 • Arsenic33 • Zirconium40 • Molybdenum42 • Rhodium45 • Palladium46 • Silver47 • Cadmium48 • Tin50 • Antimony51 • Tellurium52 • Caesium55 • Terbium65 • Erbium68 • Thulium69 • Tantalum73 • Tungsten74 • Iridium77 • Platinum78 • Gold79 • Mercury80 • Lead82 • Bismuth83 • Radon86 • Radium88 • Thorium90 • Uranium92 • Neptunium93 • Plutonium94 • Californium98 • (Ek104) • Dubnium105
Universal
periodic table
Greek elements
Water • Earth • Fire • Air
Chinese elements
Water • Earth • Fire • Wood • Metal
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