Krypton,  ₃₆Kr

A krypton-filled discharge tube glowing white
Spectral lines of krypton
عمومي خواص
Pronunciation	/ˈkrɪptɒn/ KRIP-ton
Appearance	colorless gas, exhibiting a whitish glow in an electric field
Krypton په دوراني جدول کې
Ar ↑ Kr ↓ Xe bromine ← krypton → rubidium ‍
اټومي شمیره (Z)	36
گروپ, پیریود	group 18 (noble gases), period 4
بلاک	p-block
Element category	noble gas
معياري اټومي وزن (Ar)	کينډۍ:Val[۱]
Electron configuration	[Ar] 3d10 4s2 4p6
Electrons per shell	2, 8, 18, 8
فزیکي خواص
حالت (at STP)	گاز
دويلې کيدو ټکى	115.78 K ​(−157.37 °C, ​−251.27 °F)
يشنا ټکی	119.93 K ​(−153.415 °C, ​−244.147 °F)
کثافت (at STP)	3.749 g/L
when liquid, at b.p.	2.413 g/cm3[۲]
Triple point	115.775 K, ​73.53 kPa[۳][۴]
Critical point	209.48 K, 5.525 MPa[۴]
Heat of fusion	1.64 kJ/mol
Heat of vaporization	9.08 kJ/mol
Molar heat capacity	20.95[۵] J/(mol·K)
Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 59 65 74 84 99 120
اټومي خواص
Oxidation states	2, 1, 0 ​(rarely more than 0; unknown oxide)
Electronegativity	Pauling scale: 3.00
Ionization energies	1st: 1350.8 kJ/mol 2nd: 2350.4 kJ/mol 3rd: 3565 kJ/mol
Covalent radius	116±4 pm
Van der Waals radius	202 pm
Miscellanea
Crystal structure	​face-centered cubic (fcc)
Speed of sound	(gas, 23 °C) 220 m·s−1 (liquid) 1120 m/s
د تودوخې تېرېدنه	9.43×10−3  W/(m·K)
Magnetic ordering	diamagnetic[۶]
Magnetic susceptibility (χmol)	−28.8·10−6 cm3/mol (298 K)[۷]
CAS Number	7439-90-9
History
Discovery and first isolation	William Ramsay and Morris Travers (1898)
Main isotopes of krypton
آيسو­ټوپ Abun­dance نیم ژوند (t1/2) Decay mode Pro­duct 78Kr 0.36% 9.2×1021 y[۸] εε 78Se کينډۍ:Infobox element/isotopes decay3 80Kr 2.29% stable کينډۍ:Infobox element/isotopes decay2 82Kr 11.59% stable 83Kr 11.50% stable 84Kr 56.99% stable 85Kr syn 11 y β− 85Rb 86Kr 17.28% stable
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کرېپټون (په انگرېزي: Krypton) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Kr سمبول او ۳۶ اتمي شمېرې په وسیله ښودل شوی دی.

1. ↑ Meija, J.; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265–91. doi:10.1515/pac-2015-0305. منځګړی |CitationClass= له پامه غورځول شوی (لارښود)
2. ↑ Krypton. encyclopedia.airliquide.com
3. ↑ "Section 4, Properties of the Elements and Inorganic Compounds; Melting, boiling, triple, and critical temperatures of the elements". CRC Handbook of Chemistry and Physics (چاپ 85th). Boca Raton, Florida: CRC Press. 2005. منځګړی |CitationClass= له پامه غورځول شوی (لارښود)
4. ↑ ^{۴٫۰ ۴٫۱} کينډۍ:RubberBible92nd
5. ↑ Shuen-Chen Hwang, Robert D. Lein, Daniel A. Morgan (2005). "Noble Gases". Kirk Othmer Encyclopedia of Chemical Technology. Wiley. pp. 343–383. doi:10.1002/0471238961.0701190508230114.a01.
6. ↑ Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., سمونګر (2005). CRC Handbook of Chemistry and Physics (چاپ 86th). Boca Raton (FL): CRC Press. د کتاب نړيواله کره شمېره 0-8493-0486-5. منځګړی |CitationClass= له پامه غورځول شوی (لارښود)
7. ↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. مخونه E110. د کتاب نړيواله کره شمېره 0-8493-0464-4. منځګړی |CitationClass= له پامه غورځول شوی (لارښود)
8. ↑ Patrignani, C.; et al. (Particle Data Group) (2016). "Review of Particle Physics". Chinese Physics C. 40 (10): 100001. doi:10.1088/1674-1137/40/10/100001. منځګړی |CitationClass= له پامه غورځول شوی (لارښود) See p. 768