Chemicool

Na

11

22.98977
Sodium
General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles

General

Name Sodium Symbol Na
atomic number 11 Atomic weight 22.98977
Density @ 293 K 0.971 g/cm3 Atomic volume 23.7 cm3/mol
Group Alkali Met. discovered 1807

States

state (s, l, g) s
melting point 371.01 K boiling point 1154.6 K
Heat of fusion 2.598 kJ/mol Heat of vaporization 96.960 kJ/mol
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Energies

1st ionization energy 495.8 kJ/mole electronegativity 0.93
2nd ionization energy 4562.4 kJ/mole electron affinity 52.868 kJ/mole
3rd ionization energy 6912.2 kJ/mole Specific heat 1.23 J/gK
heat atomization 109 kJ/mole atoms

Oxidation & Electrons

Shells 2,8,1 electron configuration [Ne] 3s1
minimum oxidation number -1 maximum oxidation number 1
min. common oxidation no. 0 max. common oxidation no. 1
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Appearance & Characteristics

structure bcc: body-centered cubic color silvery
uses lamps, table salt toxicity
hardness 0.4 mohs characteristics soft

Reactions

reaction with air vigorous, = Na2O2 reaction with 6M HCl vigorous, = H2, NaCl
reaction with 6M HCl vigorous, = H2, NaCl reaction with 15M HNO3 vigorous, = NaNO3, NOx
reaction with 6M NaOH vigorous, = H2, NaOH
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Other Forms

number of isotopes 1 hydride(s) NaH
oxide(s) Na2O chloride(s) NaCl

Radius

ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 186 pm ionic radius (1+ ion) 116 pm
ionic radius (2+ ion) pm ionic radius (3+ ion) pm
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Conductivity

thermal conductivity 142 J/m-sec-deg electrical conductivity 209.6 1/mohm-cm
polarizability 23.6 A^3

Abundance

source Halite (misc) rel. abund. solar system 4.759 log
abundance earth's crust 4.4 log cost, pure 7 $/100g
cost, bulk $/100g
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