Natrium

11
Na
Golongan
1
Periode
3
Blok
s
Proton
Elektron
Neutron
11
11
12
Sifat Umum
Nomor atom
11
Massa atom
22,98976928
Nomor massa
23
Kategori
Logam alkali
Warna
Perak
Radioaktif
Tidak
Dari kata bahasa Inggris, soda; dan dari bahasa Latin Abad Pertengahan, sodanum: obat sakit kepala
Struktur kristal
Kubik Berpusat-badan
Sejarah
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.
Elektron per kulit
2, 8, 1
Konfigurasi elektron
[Ne] 3s1
Na
Sodium burns in air with a brilliant yellow flame
Sifat Fisika
Fase
Solid
Kepadatan
0,971 g/cm3
Titik lebur
370,87 K | 97,72 °C | 207,9 °F
Titik didih
1156,15 K | 883 °C | 1621,4 °F
Kalor peleburan
2,6 kJ/mol
Kalor penguapan
97,7 kJ/mol
Kapasitas kalor molar
1,228 J/g·K
Kelimpahan di kerak bumi
2,3%
Kelimpahan di alam semesta
0,002%
Sodium
Kredit Gambar: Wikimedia Commons (Dnn87)
Sodium metal from the Dennis s.k collection
Nomor CAS
7440-23-5
PubChem CID Number
5360545
Sifat Atom
Jari-jari atom
186 pm
Jari-jari kovalen
166 pm
Elektronegativitas
0,93 (Skala Pauling)
Potensi Ionisasi
5,1391 eV
Volume atom
23,7 cm3/mol
Kondusivitas termal
1,41 W/cm·K
Bilangan oksidasi
-1, 1
Aplikasi
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
Isotop
Isotop stabil
23Na
Isotop tidak stabil
18Na, 19Na, 20Na, 21Na, 22Na, 24Na, 25Na, 26Na, 27Na, 28Na, 29Na, 30Na, 31Na, 32Na, 33Na, 34Na, 35Na, 36Na, 37Na