Today's puzzle

Elements / 10

10Ne20.180

Neon

Noble gas · p-block · ring L · spoke 18

Neon is element 10, a noble gas. It sits on ring L (period 2) on spoke 18, the noble gases. Follow that spoke toward the center and out again to find its chemical relatives.

HHeLiBeBCNOFNeNaMgAlSiPSClArKCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKrRbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXeCsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRnFrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMcLvTsOg119120

Properties

Density0.9 g/L (as a gas)Terrain →
Melting point25 K · -249 °CTerrain →
Boiling point27 K · -246 °CTerrain →
ElectronegativityNot measuredTerrain →
First ionization energy2,081 kJ/mol2nd highest ionization energy of 103Terrain →
Atomic weight20.1798 uTerrain →
Crustal abundance0.005 ppmTerrain →
Discovered1898Terrain →

Values from open reference data; see sources. "Terrain" opens that property as a 3D landscape across the whole spiral.

Two things you might not know

  1. In 1923 a Los Angeles Packard car dealership bought two large signs lit by it, introducing such signs to the U.S.
  2. Named in 1898 from the Greek for 'new'; it glows a bright reddish-orange in glass sign tubes.

Checked against en.wikipedia.org.

Spoke 18: Noble gases

Ring L (period 2)

Play with Neon

Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.