Helium - Simple English Wikipedia, the free encyclopedia

“colorless gas, exhibiting a red-orange glow when placed in an electric field 4.002602(2)[1] Atomic number (Z) 2 Group group 18 (noble gases) Period period 1 Block s-block Electron configuration 1s2 Electrons per shell Phase at STP gas Melting point 0.95 K ​(−272.20 °C, ​−457.96 °F) (at 2.5 MPa)...” (from the page’s text)

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