Krypton

36
Kr
Kumpulan
18
Kala
4
Blok
p
Proton
Elektron
Neutron
36
36
48
Ciri-Ciri Am
Nombor atom
36
Berat atom
83.798
Nombor jisim
84
Kategori
Gas adi
Warna
Tidak berwarna
Radioaktif
Tidak
From the Greek word kryptos, hidden
Struktur hablur
Pusat Wajah Kubik
Sejarah
Scottish chemist Sir William Ramsay and his assistant English chemist Morris Travers discovered krypton in 1898 in London.

They found krypton in the residue left from evaporating nearly all components of liquid air.

William Ramsay was awarded the 1904 Nobel Prize in Chemistry for discovery of a series of noble gases, including krypton.
Bilangan elektron per petala
2, 8, 18, 8
Konfigurasi elektron
[Ar] 3d10 4s2 4p6
Kr
When ionized, krypton gas emits bright white light
Ciri-Ciri Fizikal
Fasa
Gas
Ketumpatan
0.003733 g/cm3
Takat lebur
115.79 K | -157.36 °C | -251.25 °F
Takat didih
119.93 K | -153.22 °C | -243.8 °F
Haba pelakuran
1.64 kJ/mol
Haba pengewapan
9.02 kJ/mol
Muatan haba molar
0.248 J/g·K
Banyak pada kerak bumi
1.5×10-8%
Banyak pada alam semesta
4×10-6%
Vial
Kredit imej: Images-of-elements
Vial of glowing ultrapure krypton
Nombor CAS
7439-90-9
PubChem CID Number
5416
Ciri-Ciri Atom
Jejari atom
88 pm
Jejari kovalen
116 pm
Keelektronegatifan
3.00 (Skala Pauling)
Kebolehan mengion
13.9996 eV
Isipadu atom
38.9 cm3/mol
Daya pengaliran terma
0.0000949 W/cm·K
Keadaan pengoksidaan
2
Aplikasi
Krypton is used in certain photographic flash lamps for high-speed photography.

Krypton-83 has application in magnetic resonance imaging (MRI) for imaging airways.

Krypton is used as a filling gas for energy-saving fluorescent lights and as an inert filling gas in incandescent bulbs.
Krypton is considered to be non-toxic
Isotop
Isotop stabil
78Kr, 80Kr, 82Kr, 83Kr, 84Kr, 86Kr
Isotop tidak stabil
69Kr, 70Kr, 71Kr, 72Kr, 73Kr, 74Kr, 75Kr, 76Kr, 77Kr, 79Kr, 81Kr, 85Kr, 87Kr, 88Kr, 89Kr, 90Kr, 91Kr, 92Kr, 93Kr, 94Kr, 95Kr, 96Kr, 97Kr, 98Kr, 99Kr, 100Kr, 101Kr