Sodium
Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
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| Ìfarahàn |
silvery white metallic
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| Àwọn ìní àníkárí |
| Orúkọ, àmì-ìdámọ̀, nọ́mbà |
sodium, Na, 11 |
| Ẹ̀ka apilẹ̀sẹ̀ |
alkali metal |
| Àdìpọ̀, ìgbà, block |
1, 3, s |
| Ìwúwo átọ́mù |
22.98976928(2) g·mol−1 |
| Ìtòjọ ẹ̀lẹ́ktrónì |
[Ne] 3s1 |
| Àwọn ẹ̀lẹ́ktrónì lórí ọ̀nà kan |
2,8,1 (Image) |
| Àwọn ìní aláfójúrí |
| Phase |
solid |
| Kíki (tó súnmọ́ r.t.) |
0.968 g·cm−3 |
| Liquid density at m.p. |
0.927 g·cm−3 |
| ojúàmì ìyọ́ |
370.87 K, 97.72 °C, 207.9 °F |
| ajúàmì ìhó |
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 |
| Specific heat capacity |
(25 °C) 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 |
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| Atomic properties |
| Oxidation states |
+1, -1
(strongly basic oxide) |
| Electronegativity |
0.93 (Pauling scale) |
Ionization energies
(more) |
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 |
| Miscellanea |
| Crystal structure |
body-centered cubic |
| Magnetic ordering |
paramagnetic |
| Electrical resistivity |
(20 °C) 47.7 nΩ·m |
| Thermal conductivity |
(300 K) 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 |
| 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 |
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