The second light element-Helium

The second light element-Helium
An Internet Hotlist on helium

created by lisachen10

Introduction | background information | Current News | add and news

Introduction

Image from http://upload.wikimedia.org/wikipedia/commons/thumb/1/1f/HeTube.jpg/800px-HeTube.jpg

The Internet Resources

background information

Chemical Data - Janssen was the first person discovered helium in 1868. Helium does not have any colors and it is lighter than air. If mix the 80% helium and 20% oxygen is used an artificial atmosphere for divers and the person who’s working under the pressure. Helium does not working in the biological function. The helium does not have toxic. Helium’s boiling point is almost absolute zero.
Jefferson Lab - Helium’s melting point is 0.95K. The boiling point is 4.22K. The density is 0.0001785 grams per cubic centimeter. Helium is a gas. Helium was discovered on the sun.
My site - Helium was discovered in the end of the 19th century. Helium is gas associated with the blue rock salt of Germany. The search for helium in the earth was unavailing. In 1890, Rayleigh and Ramsay discovered that the helium was lighter than the nitrogen. Helium is to light that it cannot balance. Also the helium will exits from the hole at high pressure.
New and Feature - Helium will become to liquid when the temperature is very low. Helium is the only substance that remains liquid when the temperature is zero. People put the helium into the balloons. 4He remains liquid at zero temperature if the pressure is below 2.5 MPa.
Perodic Table - Helium’s atomic mass is 4.002602 amu. The melting point is -272.0 °C (-457.6 °F). The boiling point is -268.6 °C (-451.48 °F.) Helium’s crystal structure is Hexagonal. The density is 293 K: 0.1785 g/cm3
Visual Element - Helium was discovered by Sir William Ramsay in London, and independently by P.T. Cleve and N.A. Langlet in Uppsala, Sweden in 1895. Helium does not have any color and any smell. This gas is totally uncreative. It is extracted from natural gas. Some of which contain gas that is 7% helium. It is used in deep sea diving for balloons and, as liquid helium.
Wikipedia-Helium - Helium is the second lightest element. We usually put this gas in the balloons. There is a helium-3 in the world. Helium has less water than other gases. The number of helium is 2.

Current News

CGA net - Most people only know about is really dangerous to inhaling helium. Helium is no lightest gas on the earth, but it is really rare in the earth. Helium does not mix with any other elements. Helium was discovered on the sun. Helium is the lightest gas and it even lighters that air.
Corrosion Source - Helium has the lowest melting point in all the elements. It widely used in cryogenic research because its boiling point is almost zero. Helium normally has a 0 valence. It does not really combine with other elements. Helium is also being used to advertise on blimps for various companies, including Goodyear.
Theodoregray-Helium - Helium representing about 10% of the total matter. Most helium is on the stars. In the earth is very rare. Helium is a noble gas. That is why helium doesn't react with anything elements.
Webelements - Helium is uses for arc welding. Helium is cheaper than argon. Mixture of 80% helium and 20% oxygen is used for divers and others working under pressure. Helium is a semiconductor material. Helium is very rare in the earth. There is lot helium in the stars.
wise Geek - Helium is a chemical element. It appeared in great abundance throughout the universe, although it is not as widely distributed on Earth. Helium is very stable and it does not mix with other elements. The helium was discovered in 1868. When astronomers discovered a strange band of light during a solar eclipse, helium is the second most abundant element in the universe. Helium became a very important tool during the First World War. Helium has the potential of military in nature.

add and news

Environmental Chemistry - . Helium used in balloons, deep sea diving, welding, very low temperature research and nuclear power plant coolant. Helium has the lowest melting and boiling point of all the elements. Liquid Helium is called 'quantum fluid'. Liquid helium can do thermal conductivity.
Periodic - Except hydrogen, helium is the most abundant gas found in the university. Helium is extracted from the natural gas. Helium has the lowest melting pint of any element. It’s widely used in cryogenic research because helium’s boiling point is very close to absolute zero.
Wikipedia-Helium-3 - Helium-3's mass number is 3.016. Helium-3 is a light, non radioactive isotope. Helium-3 is very rare in the earth. Helium-3's atomic mass is 3.016. Helium-3 was exist on the Moon.

Content by lisachen10
http://www.kn.att.com/wired/fil/pages/listheliumli.html
Last revised Sun Dec 16 9:44:29 US/Pacific 2007