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silvery white metallic

Spectral lines of sodium
General properties
Name, simbolo, kaiphan sodium, Na, 11
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Element category puthaw
Group, period, block 13, s
Standard atomic weight 22.98976928(2)
Electron configuration [Ne] 3s1
Electron shells of sodium (2,8,1)
Discovery Humphry Davy (1807)
First isolation Humphry Davy (1807)
Physical properties
Phase magahi
Density (near r.t.) 0.968 g·cm−3
Liquid density at m.p. 0.927 g·cm−3
Melting point 370.87 K, 97.72 °C, 207.9 °F
Boiling point 1156 K, 883 °C, 1621 °F
Critical point (extrapolated)
2573 K, 35 MPa
Heat of fusion 2.60 kJ·mol−1
Heat of vaporization 97.42 kJ·mol−1
Molar heat capacity 28.230 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 554 617 697 802 946 1153
Atomic properties
Oxidation states +1, -1
(strongly basic oxide)
Electronegativity 0.93 (Pauling scale)
Ionization energies
1st: 495.8 kJ·mol−1
2nd: 4562 kJ·mol−1
3rd: 6910.3 kJ·mol−1
Atomic radius 186 pm
Covalent radius 166±9 pm
Van der Waals radius 227 pm
Crystal structure body-centered cubic
Sodium has a body-centered cubic crystal structure
Magnetic ordering paramagnetic
Electrical resistivity (20 °C) 47.7 nΩ·m
Thermal conductivity 142 W·m−1·K−1
Thermal expansion (25 °C) 71 µm·m−1·K−1
Speed of sound (thin rod) (20 °C) 3200 m·s−1
Young's modulus 10 GPa
Shear modulus 3.3 GPa
Bulk modulus 6.3 GPa
Mohs hardness 0.5
Brinell hardness 0.69 MPa
CAS registry number 7440-23-5
Most stable isotopes
Main article: Isotopes of sodium
iso NA half-life DM DE (MeV) DP

Plantilya:Infobox element/isotopes decay3 (2 2 1)

23Na 100% 23Na is stable with 12 neutrons
· r

Ang sodio (Iningles sodium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Na ug kaiphan nga atomik 11. Ang sodio mao ang puthaw.

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