କ୍ରିପ୍‌ଟନ

କ୍ରିପ୍‌ଟନ (ଗ୍ରୀକ: [κρυπτός କ୍ରିପ୍‌ଟସ୍] Error: {{Lang}}: text has italic markup (help)ରୁ ଅସିଛି,ମାନେ "ଲୁଚି ରହିଥିବା ଜିନିଷ") ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Kr ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୩୬ ।

Krypton,  ₃₆Kr

Spectral lines of krypton
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	krypton, Kr
Appearance	colorless gas, exhibiting a whitish glow in a high electric field
ଉଚ୍ଚାରଣ	/ˈkrɪptɒn/ KRIP-ton
Krypton in the periodic table
Ar ↑ Kr ↓ Xe bromine ← krypton → rubidium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	36
ଶ୍ରେଣୀ, ବ୍ଳକ	group 18 (noble gases), p-block
ପର୍ଯ୍ୟାୟ	period 4
ମୌଳିକ ପ୍ରକାର	noble gas
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)	83.798
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Ar] 3d10 4s2 4p6
per shell	2, 8, 18, 8
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	gas
ଗଳନାଙ୍କ	115.79 K ​(-157.36 °C, ​-251.25 °F)
ସ୍ଫୁଟନାଙ୍କ	119.93 K ​(-153.22 °C, ​-244.12 °F)
ଘନତା at stp (0 °C and 101.325 kPa)	3.749 g/L
when liquid, at b.p.	2.413[1] g/cm3
Triple point	115.775 K, ​73.2 kPa [2]
Critical point	209.41 K, 5.50 MPa
Heat of fusion	1.64 kJ/mol
Heat of	9.08 kJ/mol
Molar heat capacity	5R/2 = 20.786 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 59 65 74 84 99 120
Atomic properties
Oxidation states	2, 1, 0
Electronegativity	Pauling scale: 3.00
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, (liquid) 1120 m/s
Thermal conductivity	9.43×10-3  W/(m·K)
Magnetic ordering	diamagnetic[3]
CAS Number	7439-90-9
ଇତିହାସ
ଆବିଷ୍କାର	William Ramsay and Morris Travers (1898)
First isolation	William Ramsay and Morris Travers (1898)
Most stable isotopes of krypton
iso NA half-life DM DE (MeV) DP 78Kr 0.35% >1.1×1020 y β+β+ 2.846 78Se 79Kr syn 35.04 h ε - 79Br β+ 0.604 79Br γ 0.26, 0.39, 0.60 - 80Kr 2.25% 80Kr is stable with 44 neutrons 81Kr trace 2.29×105 y ε - 81Br γ 0.281 - 82Kr 11.6% 82Kr is stable with 46 neutrons 83Kr 11.5% 83Kr is stable with 47 neutrons 84Kr 57.0% 84Kr is stable with 48 neutrons 85Kr syn 10.756 y β− 0.687 85Rb 86Kr 17.3% 86Kr is stable with 50 neutrons
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ଆଧାର

1. Krypton. encyclopedia.airliquide.com
2. "Section 4, Properties of the Elements and Inorganic Compounds; Melting, boiling, triple, and critical temperatures of the elements". CRC Handbook of Chemistry and Physics (85th edition ed.). Boca Raton, Florida: CRC Press. 2005. {{cite book}}: |edition= has extra text (help)
3. Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.

ଆହୁରି ପଢନ୍ତୁ

• William P. Kirk "Krypton 85: a Review of the Literature and an Analysis of Radiation Hazards", Environmental Protection Agency, Office of Research and Monitoring, Washington (1972)

ବାହାର ଲିଙ୍କ

• Krypton at The Periodic Table of Videos (University of Nottingham)
• Krypton Fluoride Lasers Archived 2007-02-03 at the Wayback Machine., Plasma Physics Division Naval Research Laboratory