elemento chimic From Wikipedia, the free encyclopedia
Sodium o natrium es un elemento chimic de symbolo Na e numero atomic 11. Illo es un metallo molle, argentee-blanc, e multo reactive. Su unic isotopo stabile es 23Na. Es plus communmente incontrate in le forma de chloruro de sodium, sal commun.
Neon ← Sodium → Magnesium | |
Apparentia | |
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metallic argentee-blanc | |
Proprietates atomic | |
Nomine, symbolo, numero | Sodium, Na, 11 |
Serie chimic | metallo alcalin |
Gruppo, periodo, bloco | 1, 3, s |
Configuration electronic | [Ne] 3s1 |
Electronegativitate | 0,93 |
Proprietates physic | |
Stato | solido |
Massa molar | 22,98976928(2) g·mol−1 |
Densitate | 0,968 g·cm-3 |
Densitate liquide al p.f. | 0,927 g·cm-3 |
Puncto de fusion | 370,87 K, 97,72 °C, 207.9 °F |
Puncto de ebullition | 1156 K, 883 °C, 1621 °F |
Puncto critic | 2573 K, 35 MPa (extrapolava) |
Calor de fusion | 2,60 kJ·mol−1 |
Calor de vaporisation | 97,42 kJ·mol−1 |
Calor specific | 28,230 J·mol−1·K−1 |
Resistivitate electric | (20 °C) 47,7 nΩ·m |
Conductivitate thermal | 142 W·m−1·K−1 |
Expansion thermal | (25 °C) 71 µm·m−1·K−1 |
Velocitate de sono | (20 °C) 3200 m·s−1 |
Valores in unitates SI e in le conditiones normal del material (25 °C, 100 kPa) si non indica al contrario. | |
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