ର‍୍ୟାଡ଼ନ

ର‍୍ୟାଡ଼ନ ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Rn ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୮୬ ।

Radon,  ₈₆Rn

A small gold tube filled with radon gas, causing radioluminescence of the phosphor layer below
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	radon, Rn
Appearance	colorless gas
ଉଚ୍ଚାରଣ	/ˈreɪdɒn/ RAY-don
Radon in the periodic table
Xe ↑ Rn ↓ Uuo astatine ← radon → francium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	86
ଶ୍ରେଣୀ, ବ୍ଳକ	group 18 (noble gases), p-block
ପର୍ଯ୍ୟାୟ	period 6
ମୌଳିକ ପ୍ରକାର	noble gas
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)	(222)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Xe] 4f14 5d10 6s2 6p6
per shell	2, 8, 18, 32, 18, 8
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	gas
ଗଳନାଙ୍କ	202.0 K ​(−71.15 °C, ​−96.07 °F)
ସ୍ଫୁଟନାଙ୍କ	211.3 K ​(−61.85 °C, ​−79.1 °F)
ଘନତା at stp (0 °C and 101.325 kPa)	9.73 g/L
when liquid, at b.p.	4.4 g/cm3
Critical point	377 K, 6.28 MPa
Heat of fusion	3.247 kJ/mol
Heat of	18.10 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) 110 121 134 152 176 211
Atomic properties
Oxidation states	6, 2, 0
Electronegativity	Pauling scale: 2.2
Covalent radius	150 pm
Van der Waals radius	220 pm
Miscellanea
Crystal structure	​face-centered cubic (fcc)
Thermal conductivity	3.61 m W/(m·K)
Magnetic ordering	non-magnetic
CAS Number	10043-92-2
ଇତିହାସ
ଆବିଷ୍କାର	Friedrich Ernst Dorn (1898)
First isolation	William Ramsay and Robert Whytlaw-Gray (1910)
Most stable isotopes of radon
iso NA half-life DM DE (MeV) DP 210Rn syn 2.4 h α 6.404 206Po 211Rn syn 14.6 h ε 2.892 211At α 5.965 207Po 222Rn trace 3.8235 d α 5.590 218Po 224Rn syn 1.8 h β− 0.8 224Fr

ଧର୍ମ

ବାହାର ଲିଙ୍କ

• Radon and radon publications at the United States Environmental Protection Agency
• National Radon Program Services hosted by Kansas State University
• Radon Information from the UK Health Protection Agency
• Frequently Asked Questions About Radon at National Safety Council
• Radon at The Periodic Table of Videos (University of Nottingham)
• Radon and Lung Health from the American Lung Association
• Radon's impact on your health – Lung Association
• The Geology of Radon, James K. Otton, Linda C.S. Gundersen, and R. Randall Schumann
• Map referring to radon concentrations in England and Wales
• Home Buyer's and Seller's Guide to Radon An article by the International Association of Certified Home Inspectors (InterNACHI)
• EPA Federal Radon Mitigation Action Plan
• Toxicological Profile for Radon, Draft for Public Comment, Agency for Toxic Substances and Disease Registry, September 2008
• Health Effects of Exposure to Radon: BEIR VI. Committee on Health Risks of Exposure to Radon (BEIR VI), National Research Council available on-line
• UNSCEAR 2000 Report to the General Assembly, with scientific annexes: Annex B: Exposures from natural radiation sources.
• Should you measure the radon concentration in your home?, Phillip N. Price, Andrew Gelman, in Statistics: A Guide to the Unknown, January 2004.