- Atomic Mass: 22.989768
- Electronegativity:
- Pauling: 0.93
- Allred: 1.01
- Absolute: 2.85 eV
- Electron Affinity: 52.9 kJ mol-1
- Polarizability: 23.6 Å3
- Effective Nuclear Charge:
- Slater: 2.2
- Clementi: 2.51
- Froese Fischer: 3.21
- Radius:
- Na 1 +: 98 pm
- Atomic: 153.7 pm
- Van der Waals: 231 pm
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- Atomic Ionization Energies:
- 3s : 496 kJ mol-1
- 2p : 3280 kJ mol-1
- 2s : 6368 kJ mol-1
- 1s : 103721 kJ mol-1
- Successive Ionization Energies:
- Na -› Na + : 495.8 kJ mol-1
- Na+1 -› Na+2 : 4562.4 kJ mol-1
- Na+2 -› Na+3 : 6912 kJ mol-1
- Na+3 -› Na+4 : 9543 kJ mol-1
- Na+4 -› Na+5 : 13353 kJ mol-1
- Na+5 -› Na+6 : 16610 kJ mol-1
- Na+6 -› Na+7 : 20114 kJ mol-1
- Na+7 -› Na+8 : 25490 kJ mol-1
- Na+8 -› Na+9 : 28933 kJ mol-1
- Na+9 -› Na+10 : 141360 kJ mol-1
- Common Ions : Na 1 +
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