10Ne20.180
Noble Gasp-block
Neon
Element 10 on the periodic table, symbol Ne, group 18, period 2.
Neon 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.
Appearance: colorless gas exhibiting an orange-red glow when placed in a high voltage electric field
Properties
- Atomic Number
- 10
- Atomic Mass
- 20.1798 u
- Group
- 18
- Period
- 2
- Block
- p-block
- Category
- Noble Gas
- State at 25 °C
- Gas
- Melting Point
- 24.6 K · -248.6 °C
- Boiling Point
- 27.1 K · -246 °C
- Density
- 0.9002 g/L
- Atomic Radius
- 38 pm
- Electronegativity
- Not measured
- Oxidation States
- None commonly seen
- Abundance in Crust
- 5.00e-5 mg/kg
- Discovered
- 1898
- Discovered By
- Morris Travers
Electron Configuration
[He] 2s2 2p6
1s2 2s2 2p6
Ionisation Energies (kJ/mol)
- 1. 2,080.7
- 2. 3,952.3
- 3. 6,122
- 4. 9,371
- 5. 12,177
- 6. 15,238
- 7. 19,999
- 8. 23,069.5
Elements near Neon
Elements in the same group share the number of outer electrons and behave in similar ways. Elements in the same period share a shell, so they change steadily from left to right.