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Peciettas de chimiaElementos chimicMetallos alcalin


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Sodium




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Neon ← Natrium → Magnesium
Apparentia

Na (Sodium).jpg
metallic argentee-blanc
Proprietates atomic
Nomine, symbolo, numero
Natrium, 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.



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.





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