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Whose discovery of helium began with a solar eclipse?
ChemistryElements
Quick Answer
Helium was first identified in the Sun’s spectrum by Pierre Janssen and Norman Lockyer in 1868. It was isolated on Earth later, in 1895, by Sir William Ramsay.
The Full Story
Helium was first detected spectroscopically in 1868 when Pierre Janssen observed a yellow line during a solar eclipse, and Norman Lockyer independently recognized it as a new element. The element was initially found in the Sun before it was found on Earth, which was unusual for the time. Helium was later isolated from a uranium mineral by Sir William Ramsay in 1895. It became the second lightest element and one of the most important noble gases in chemistry.
Key Facts
1.identified in 1868 solar spectra
2.isolated on Earth in 1895
3.helium is the second lightest element
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Suggested video title for this topic:
"The element found in the Sun before it was found on Earth"