slide1
Download
Skip this Video
Download Presentation
Noble Gases- Helium

Loading in 2 Seconds...

play fullscreen
1 / 15

Noble Gases- Helium - PowerPoint PPT Presentation


  • 235 Views
  • Uploaded on

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”. Isolated on Earth by Sir William Ramsay in 1895. Name and ABC#. Helium. In a neutral atom, Helium contains 2 protons and 2 electrons.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Noble Gases- Helium' - ozzy


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2

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”

Isolated on Earth by Sir William Ramsay in 1895

Name and ABC#

slide3

Helium

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

Toby 5-15

slide4

Common Uses of Helium

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

Toby 5-15

slide5

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

Tofu Becky 5-15

slide6

Common Uses of Helium

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

Toby 5-15

slide7

Helium-Interesting Facts

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

Toby 5-15

slide8

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

slide9

Noble Gases – Neon

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

Protons: 10

Electrons: 10

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

Emily Lawless, 5-8

slide10

Common Uses for Neon

Neon is mainly used for advertising signs

Emily Lawless, 5-8

slide11

Common Uses for Neon

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

Emily L awless 5-8

slide12

Common Uses for Neon

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

Emily-la-ray-ray 5-8

slide13

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

Em-a-shay-shay 5-8

slide14

Physical and Chemical Properties of Noble Gases

  • Unreactive
  • Odorless
  • Colorless
  • Non-flammable
  • Have low boiling and melting points compared to other elements

Toby and Emily L. 5-15 and 5-8

slide15

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.

Name and ABC#

ad