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Noble Gases- Helium

Discovered in the sun’s spectrum by Edward Frankland and Norman Lockyer in 1868 Named after the Greek word helios, meaning “sun”

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Isolated on Earth by Sir William Ramsay in 1895

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Helium

In a neutral atom, Helium contains 2 protons and 2 electrons

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Common Uses of Helium

Helium began being used for airships after hydrogen proved to be too flammable

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Common Uses of Helium

Helium is used to fill balloons because it is not flammable and the helium will eventually leak out of the balloons

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Common Uses of Helium

Helium is combined with oxygen to fill air tanks for scuba diving. The helium reduces breathing resistance.

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Helium-Interesting Facts

While helium is naturally colorless, it appears peach-ish when an electric current passes through it

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Helium Crisis

Helium is the second most abundant element- however, much of that helium goes into space. Because a large amount of helium is going into space, helium is becoming more expensive.

Recently, an enormous amount of helium started escaping from the earth’s crust at Yellowstone National Park. However, it is unlikely the helium can be obtained and available for use.Toby 5-15

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Noble Gases – Neon

Origin- the name “Neon” is derived from the Greek word neos, which means new

Protons: 10Electrons: 10

Discovered by William Ramsay and Morris Travers in 1898 at University College London

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Common Uses for Neon

Neon is mainly used for advertising signs

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Common Uses for Neon

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Neon is also used for high-voltage indicators, lightning arrestors, wave meter tubes, and television tubes

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Common Uses for Neon

When combined with Helium, Neon can be used to make gas lasers

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Interesting Facts About Neon

Neon makes up 0.0018% of Earth’s atmosphere

Neon doesn’t have any stable compounds

Neon is the fifth most abundant element in the universe, even though it’s relatively rare on Earth

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Physical and Chemical Properties of Noble Gases

• Unreactive• Odorless• Colorless• Non-flammable • Have low boiling and melting points

compared to other elements

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A Bibliographical Bibliography on Our Sources

Emsley, John. The Elements: Third Edition. New York: Oxford University Press Inc.,1998.

Gray, Theodore. The Elements: A Visual Exploration of Every Known Atom in the Universe. New York: Black Dog and Leventhal Publishers, Inc., 2009.

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