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Helium Research Paper

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The first piece of helium's existence was on August 18, 1868. It appeared as a bright yellow line with the wavelength,λ,of 587.49 nanometers in the spectrum of the chromosphere of the sun. The line was observed by Jules Janssen, a french astronomer, during a total eclipse in Guntur,India. He had originally thought this line was Sodium. The next time helium appeared was on october 20th of the same year by Norman Lockyer, an english astronomer, had saw this same yellow line. He named it the D3 Fraunhofer line because it was close to the D1 and D2 lines of sodium. His final assumption was that it was an element of the sun unknown to earth. Lockyer and an English Chemist named the element with the greek word helios meaning sun. It was not until

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