Argon

18
Ar
Kumpulan
18
Kala
3
Blok
p
Proton
Elektron
Neutron
18
18
22
Ciri-Ciri Am
Nombor atom
18
Berat atom
39.948
Nombor jisim
40
Kategori
Gas adi
Warna
Tidak berwarna
Radioaktif
Tidak
From the Greek argos, inactive
Struktur hablur
Pusat Wajah Kubik
Sejarah
Argon was suspected to be present in air by Henry Cavendish in 1785.

It was not isolated until 1894 by Lord Rayleigh and Sir William Ramsay in Scotland.

Argon became the first member of the noble gases to be discovered.

In 1957, IUPAC agreed that the symbol should change from A to Ar.
Bilangan elektron per petala
2, 8, 8
Konfigurasi elektron
[Ne] 3s2 3p6
Ar
Argon makes a distinctive blue-green gas laser
Ciri-Ciri Fizikal
Fasa
Gas
Ketumpatan
0.0017837 g/cm3
Takat lebur
83.8 K | -189.35 °C | -308.83 °F
Takat didih
87.3 K | -185.85 °C | -302.53 °F
Haba pelakuran
1.18 kJ/mol
Haba pengewapan
6.5 kJ/mol
Muatan haba molar
0.52 J/g·K
Banyak pada kerak bumi
0.00015%
Banyak pada alam semesta
0.02%
Vial
Kredit imej: Images-of-elements
Vial of glowing ultrapure argon
Nombor CAS
7440-37-1
PubChem CID Number
23968
Ciri-Ciri Atom
Jejari atom
71 pm
Jejari kovalen
106 pm
Keelektronegatifan
-
Kebolehan mengion
15.7596 eV
Isipadu atom
22.4 cm3/mol
Daya pengaliran terma
0.0001772 W/cm·K
Keadaan pengoksidaan
0
Aplikasi
Argon gas is used to fill conventional incandescent and fluorescent light bulbs.

Argon is also used as an inert gas shield for arc welding and cutting, as blanket for the production of titanium and other reactive elements.

It is used as a protective atmosphere for growing silicon and germanium crystals.
Argon is considered to be non-toxic
Isotop
Isotop stabil
36Ar, 38Ar, 40Ar
Isotop tidak stabil
30Ar, 31Ar, 32Ar, 33Ar, 34Ar, 35Ar, 37Ar, 39Ar, 41Ar, 42Ar, 43Ar, 44Ar, 45Ar, 46Ar, 47Ar, 48Ar, 49Ar, 50Ar, 51Ar, 52Ar, 53Ar