It's Elemental: Helium
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Description: Basic physical and historical information.
It's Elemental - The Element Helium 0.95 K (-272.2°C or -458.0°F) 4.22 K (-268.93°C or -452.07°F) 0.0001785 grams per cubic centimeter , was discovered on the sun before it was found on the earth. Pierre-Jules-César Janssen, a French astronomer, noticed a yellow line in the sun's spectrum while studying a total solar eclipse in 1868. Sir Norman Lockyer, an English astronomer, realized that this line, with a wavelength of 587.49 nanometers, could not be produced by any element known at the time. It was hypothesized that a new element on the sun was responsible for this mysterious yellow emission. This unknown element was named helium by Lockyer.
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| Page title: | It's Elemental - The Element Helium |
| Keywords: | Helium,elements,the element Helium,element Helium,elemental Helium,uses of Helium,history of Helium,information about Helium,table of elements,periodic table of elements,periodical table of elements |
| Description: | The Element Helium - Basic Physical and Historical Information |
| IP-address: | 129.57.64.140 |