Discovery of helium

Helium is a chemical element; it has symbol He and atomic number 2. It is a colorless, odorless, non-toxic, inert, monatomic gas and the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements, and it does not have a melting point at standard pressures.

Summary from Wikipedia (CC BY-SA 4.0) · Dates from Wikidata (CC0)

Which happened first?

• Discovery of helium happened 5 years after Discovery of indium
• Discovery of helium happened 7 years before Discovery of gallium
• Discovery of helium happened 7 years after Discovery of rubidium
• Discovery of helium happened 7 years after Discovery of thallium
• Discovery of helium happened 8 years after Discovery of caesium

Timeline

1. Discovery of caesium1860
2. Discovery of rubidium1861
3. Discovery of thallium1861
4. Discovery of indium1863
5. Discovery of helium (this page)August 18, 1868
6. Discovery of gallium1875

Related

• Discovery of hydrogen1766
• Discovery of oxygen1774
• Discovery of PlutoFebruary 18, 1930
• Discovery of carbon1789
• Discovery of aluminium1825
• Discovery of nitrogen1772
• Discovery of sulfur1777
• Discovery of lithium1817