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Element 10 - Neon (Ne)
From
neos
, or new; discovered 1898. The best known of the inert gases, it is chiefly used in advertising. The ubiquitous "neon sign" is a glass vacuum tube containing a minute amount of neon gas: when an electic current is passed through, the tube gives off a bright orange-red light.
Properties
Atomic Number
:
10
Atomic Weight
:
20.1797
Electron Configuration
(at ground state):
1s
2
2s
2
2p
6
Oxidation States
(Bold most stable):
0
Boiling Point
(K):
27.10
Melting Point (K):
24.55
Density
(at
STP
-- g/l):
0.900
Atomic Volume (liquid state at boiling point -- cm
3
/mol)
16.90
Number of stable
isotopes
:
3
Covalent Radius (Å):
0.71
Atomic Radius (Å):
0.51
First
Ionization Potential
(V):
21.564
Specific Heat
Capacity (at 300K -- J g
-1
K
-1
):
1.030
Heat of Vaporization (kJ/mol):
1.77
Heat of Fusion (kJ/mol):
0.34
Thermal Conductivity (at 300K -- W m
-1
K
-1
):
0.0493
Crystal Structure:
Cubic, face centered