Natrium

11
Na
Gruppe
1
Periode
3
Blok
s
Protons
Electrons
Neutrons
11
11
12
General Properties
Atomnummer
11
Atommasse
22,98976928
Mass Number
23
Kategori
Alkalimetaller
Farve
Silver
Radioactive
Nej
From the English word, soda; Medieval Latin, sodanum: a headache remedy
Krystalstruktur
Rumcentreret Kubisk
History
The chemical abbreviation for sodium was first published by Jöns Jakob Berzelius in his system of atomic symbols.

It is a contraction of the element's new Latin name natrium, which refers to the Egyptian natron, a natural mineral salt primarily made of hydrated sodium carbonate.

In 1807, Sir Humphry Davy isolated sodium for the first time by electrolysis of dried sodium hydroxide, which had been very slightly moistened.
Elektroner i hver skal
2, 8, 1
Elektronkonfiguration
[Ne] 3s1
Na
Sodium burns in air with a brilliant yellow flame
Physical Properties
Tilstandsform
Fast stof
Massefylde
0,971 g/cm3
Smeltepunkt
370,87 K | 97,72 °C | 207,9 °F
Kogepunkt
1156,15 K | 883 °C | 1621,4 °F
Smeltevarme
2,6 kJ/mol
Fordampningsvarme
97,7 kJ/mol
Varmefylde
1,228 J/g·K
Abundance in Earth's crust
2,3%
Abundance in Universe
0,002%
Sodium
Billede akkrediteringer: Wikimedia Commons (Dnn87)
Sodium metal from the Dennis s.k collection
CAS Number
7440-23-5
PubChem CID Number
5360545
Atomic Properties
Atomradius
186 pm
Kovalent radius
166 pm
Elektronegativitet
0,93 (Paulings skala)
Ionization Potential
5,1391 eV
Atomic Volume
23,7 cm3/mol
Varmeledningsevne
1,41 W/cm·K
Oxidationstrin
-1, 1
Applications
Metallic sodium is vital in the manufacture of esters and in the preparation of organic compounds.

Sodium vapor lamps are often used for street lighting in cities.

Liquid sodium is used as a heat transfer fluid in some fast reactors.

Sodium is also used as an alloying metal, an anti-scaling agent, and as a reducing agent for metals when other materials are ineffective.
Sodium metal should be handled with great care as it cannot be maintained in an inert atmosphere
Isotoper
Stable Isotopes
23Na
Unstable Isotopes
18Na, 19Na, 20Na, 21Na, 22Na, 24Na, 25Na, 26Na, 27Na, 28Na, 29Na, 30Na, 31Na, 32Na, 33Na, 34Na, 35Na, 36Na, 37Na