Electron microscopy
 
Argon (Ar)
- Practical Electron Microscopy and Database -
- An Online Book -
Microanalysis | EM Book                                                                                   http://www.globalsino.com/EM/        

This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
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The electronic configuration of Ar is 1s2 2s2 2p6 3s2 3p6. Because the third energy level has eight electrons (full), it is called a Nobel Gas.

As listed in Table 3217, substances with large bonding energies usually have high melting temperatures.

Table 3217. Bonding energies and melting temperatures of van der Waals bonding-type substances.

Bonding type

Substance
Bonding energy
Melting point (°C)
kJ/mol kcal/mol eV/Atom, Ion, or Molecule
van der Waals
Typical value 0.1-10      
Ar 7.7 1.8 0.08 -189
Cl2 31 7.4 0.32 -101

 

 

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