I'm not sure on the exact day but I know that it was discovered in 1895 by Sir William Ramsay. I hope that helps. . .
Helium was discovered in 18951868
Helium was discovered in the sun specroscopically
Helium was discovered in 1868 by French astronomer Jules Janssen during a solar eclipse. It was later independently discovered on Earth in 1895 by Scottish chemist Sir William Ramsay.
Pierre Janssen discovered the lines of helium in the spectra of the Sun on 18 August 1868 at Guntur (India).
Helium was first discovered as a component of the sun before being discovered on earth. Hence the name.
Neon was discovered in September 19, 1898.
Helium was discovered in 1895.
Helium was discovered in 1895 by William Ramsay.
September 1898. The exact date (or time of day) were not recorded.
helium
The spectral line for helium was first discovered by a French astronomer working in India during a solar eclipse. An English astronomer determine that this spectral line was due to a previously unknown element. An Italian physicist first detected helium on Earth. A Scottish chemist, was the first to isolate helium on Earth. So where was helium discovered? Depending on how you define "discovery" it was discovered in India, France, England, Italy or Scotland.
Pierre Janssen, who was a French astronomer discovered helium in 1868. It was the English astronomer Norman Lockyer who proposed the name helium after the Greek name of the sun, Helios.