What was discovered first helium or samarium?

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Ответ:

bridneyfondren

07.01.2022

Chemistry

The correct answer is helium, but both discoveries were quite close. Helium was discovered in 1868 during a solar eclipse by French astronomer Jules Janssen, while samarium was discovered in 1879 by a French chemist Paul Émile Lecoq de Boisbaudran.

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Ответ:

quantaviousw49

04.02.2023

Chemistry

The answer is 840,000 because 5 and up you round up 4 and down you round down. so id it was 834,527 then it would be 830,000. :: PogChamp

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