10
20.18 u
Ne
Neon
Noble Gas
Atomic Structure
Physical State
Group
18
Period
2
Block
p
Electron Configuration
[He] 2s² 2p⁶
Physical Properties
Atomic Mass:
20.18 u
Electronegativity:
N/A
Atomic Radius:
154 pm
Ionization Energy:
21.565 eV
Density:
0.0008999 g/cm³
Melting Point:
24.56 K
Boiling Point:
27.07 K
Historical Information
Discovered By:
William Ramsay
Year Discovered:
1898