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10Ne20.180
Neon
Noble GasNeon is a chemical element with symbol Ne and atomic number 10. It is in group 18 (noble gases) of the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air.
Phase: GasAppearance: colorless gas exhibiting an orange-red glow when placed in a high voltage electric field
2, 8
Physical Properties
Atomic Mass20.17976 u
Density0.9002 g/cm³
Melting Point24.56 K
Boiling Point27.104 K
Period2
PhaseGas
Chemical Properties
Electron Configuration1s2 2s2 2p6
Semantic Config[He] 2s2 2p6
Shells2, 8
Electron Affinity-116 kJ/mol
Ionization Energies
IE1: 2080.7 kJ/molIE2: 3952.3 kJ/molIE3: 6122 kJ/molIE4: 9371 kJ/molIE5: 12177 kJ/molIE6: 15238 kJ/molIE7: 19999 kJ/molIE8: 23069.5 kJ/molIE9: 115379.5 kJ/molIE10: 131432 kJ/mol
Discovery
Discovered byMorris Travers