Radon

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Radon
86Rn
Xe

Rn

Uuo
astatineradonfrancium
Appearance
colorless gas
250px
General properties
Name, simbolo, kaiphan radon, Rn, 86
Pronunciation Plantilya:IPAc-en Plantilya:Respell
Element category gas nga halangdon
Group, period, block 186, p
Standard atomic weight (222)
Electron configuration [Xe] 4f14 5d10 6s2 6p6
2, 8, 18, 32, 18, 8
Electron shells of radon (2, 8, 18, 32, 18, 8)
History
Discovery Friedrich Ernst Dorn (1898)
First isolation William Ramsay and Robert Whytlaw-Gray (1910)
Physical properties
Phase gas
Density (0 °C, 101.325 kPa)
9.73 g/L
Liquid density at b.p. 4.4 g·cm−3
Melting point 202.0 K, −71.15 °C, −96.07 °F
Boiling point 211.3 K, −61.85 °C, −79.1 °F
Critical point 377 K, 6.28 MPa
Heat of fusion 3.247 kJ·mol−1
Heat of vaporization 18.10 kJ·mol−1
Molar heat capacity 5R/2 = 20.786 J·mol−1·K−1
Vapor 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 2.2 (Pauling scale)
Ionization energies 1st: 1037 kJ·mol−1
Covalent radius 150 pm
Van der Waals radius 220 pm
Miscellanea
Crystal structure face-centered cubic
Radon has a face-centered cubic crystal structure
Magnetic ordering non-magnetic
Thermal conductivity 3.61 m W·m−1·K−1
CAS registry number 10043-92-2
Most stable isotopes
Main article: 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
t  h  u
· r

Ang radon mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Rn ug kaiphan nga atomik 86. Ang radon mao ang gas nga halangdon.

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