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Compare Aluminium vs Sodium

Comparing Aluminium (Al) and Sodium (Na). Atomic numbers 13 and 11 with atomic masses 26.982 u and 22.99 u, classified as post-transition metal and alkali metal. Below: a side-by-side comparison of their physical, atomic, electron-configuration and historical properties, including density, melting and boiling points, ionization energies, oxidation states and discovery history.

vs
Al
Aluminium
#13
Na
Sodium
#11

Periodic properties of the elements

AluminiumSodium
SymbolAlNa
Atomic number1311
Group131
Period33
Blockps
Element categoryPost-Transition MetalAlkali Metal

Physical properties

AluminiumSodium
Phase at STPSolidSolid
Density2.7 g/cm30.968 g/cm3
Atomic weight26.9815 u22.9898 u
Melting point933.47 K
660.32 °C
1220.576 °F		370.944 K
97.794 °C
208.0292 °F
Boiling point2743 K
2469.85 °C
4477.73 °F		1156.09 K
882.94 °C
1621.292 °F

Atomic properties

AluminiumSodium
Electronegativity (Pauling Scale)1.610.93
Electron affinity41.762 kJ/mol52.867 kJ/mol
Oxidation states−2, −1, +1, +2, +3
(an amphoteric oxide)		−1, +1
(a strongly basic oxide)
Ionization energies
  1. 577.5 kJ/mol
  2. 1816.7 kJ/mol
  3. 2744.8 kJ/mol
  4. 11577 kJ/mol
  5. 14842 kJ/mol
  6. 18379 kJ/mol
  7. 23326 kJ/mol
  8. 27465 kJ/mol
  9. 31853 kJ/mol
  10. 38473 kJ/mol
  11. 42647 kJ/mol
  12. 201266 kJ/mol
  13. 222316 kJ/mol
  1. 495.8 kJ/mol
  2. 4562 kJ/mol
  3. 6910.3 kJ/mol
  4. 9543 kJ/mol
  5. 13354 kJ/mol
  6. 16613 kJ/mol
  7. 20117 kJ/mol
  8. 25496 kJ/mol
  9. 28932 kJ/mol
  10. 141362 kJ/mol
  11. 159076 kJ/mol

Electron configuration

AluminiumSodium
Shorthand configuration[Ne] 3s2 3p1 [Ne] 3s1
Full configuration1s2 2s2 2p6 3s2 3p1 1s2 2s2 2p6 3s1
Electrons per shell2, 8, 32, 8, 1

History

AluminiumSodium
PredictionAntoine Lavoisier (1782)
DiscoveryHans Christian Ørsted (1824)Humphry Davy (1807)
First isolationHumphry Davy (1807)
Named byHumphry Davy (1812)
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