SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Helium
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Carbon dioxide
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Nitrogen
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Hydrogen
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Detailed explanation-1: -Helium was first discovered in the sun in 1868 before it was found on earth.
Detailed explanation-2: -Helium was detected by Janssen and Lockyer independently in the spectrum of the sun in the year 1868. Later in 1885 it was found on the earth by Ramsay.
Detailed explanation-3: -Helium, the second most abundant element in the universe, 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.
Detailed explanation-4: -August 18 and October 20, 1868: Discovery of Helium. Pierre Janssen (top) and Joseph Norman Lockyer (bottom), discovers of helium.
Detailed explanation-5: -18, 1868: Helium Discovered During Total Solar Eclipse. 1868: A French astronomer spots an unknown element, now known as helium, in the spectrum of the sun during a much-anticipated total eclipse. The event marks the first discovery of an “extraterrestrial” element, as helium had not yet been found on Earth.