Helium

atomic number 2 atomic number 2 by I aint telling you!!! capital of South Dakota Janssen sight atomic number 2 in the sun in 1868. Janssen in the archetypical place thought it was sodium, but Joseph Norman Lockyer observe that it didnt change course to the D1 and D2 lines of sodium. He named it the D3 line. Lockyer said that the fraction D3 was unknown on populace. He and Edward Franklin reason out on the name Helios after the classical god of the sun. atomic number 2 is found everywhere in space. every(prenominal) natural gases pose at least a teensy bit helium in them. Sir William Ramsey first discovered Helium on Earth by in uranium mineral clevite in the course 1895.

When he heated the uranium mineral clevite, he noticed a bright yellow comfortable in its spectrum. It looked the alike as the D3 line that was found in the sun. It was concluded that this was the element helium. In 1903, Ramsey also discovered that helium is a reaping of the spontaneous disintegration of radioactive substances. In 1907 Rutheford and Royds demo that only alpha particles ...If you want to get a honorable essay, redact it on our website: OrderCustomPaper.com

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