radon

radon (chemical element)

Periodic table location

Image

atomic symbol | Rn atomic number | 86 short electronic configuration | [Xe]6s^24f^145d^106p^6 Aufbau diagram | 6p 5d 4f 6s block | p group | 18 period | 6 atomic mass | 222 u (unified atomic mass units) (atomic mass number given for longest-lived isotope) half-life | 91.7639 hours

phase at STP | gas melting point | -71 °C (rank: 92nd) boiling point | -61.7 °C (rank: 85th) critical temperature | 377 K (rank: 12th) critical pressure | 6.28 MPa (rank: 12th) molar heat of fusion | 3 kJ/mol (rank: 73rd) molar heat of vaporization | 17 kJ/mol (rank: 81st) specific heat at STP | 93.65 J/(kg K) (rank: 86th) adiabatic index | 5/3 (rank: 1st) (properties at standard conditions)

density | 0.00973 g/cm^3 (rank: 86th) molar volume | 22800 cm^3/mol thermal conductivity | 0.00361 W/(m K) (rank: 94th) (properties at standard conditions)

color | (colorless)

valence | 6 electron affinity | 0 kJ/mol (kilojoules per mole) first ionization energy | 1037 kJ/mol (kilojoules per mole) ionization energies | 1037 kJ/mol

term symbol | ^1S_0 atomic radius | 120 pm covalent radius | 150 pm (electronic ground state properties)

(neutral radon atomic spectrum)

half-life | 91.7639 h lifetime | 132.386 h (rank: 1st) specific radioactivity | 5692 TBq/g decay mode | alpha emission nuclear spin | Rn-195: 3/2^- | Rn-196: 0^+ | Rn-197: 3/2^- | Rn-198: 0^+ | Rn-199: 3/2^- | Rn-200: 0^+ | Rn-201: 3/2^- | Rn-202: 0^+ | Rn-203: 3/2^- | Rn-204: 0^+ | Rn-205: 5/2^- | Rn-206: 0^+ | Rn-207: 5/2^- | Rn-208: 0^+ | Rn-209: 5/2^- | Rn-210: 0^+ | Rn-211: 1/2^- | Rn-212: 0^+ | Rn-213: 9/2^+ | Rn-214: 0^+ | Rn-215: 9/2^+ | Rn-216: 0^+ | Rn-217: 9/2^+ | Rn-218: 0^+ | Rn-219: 5/2^+ | Rn-220: 0^+ | Rn-221: 7/2^+ | Rn-222: 0^+ | Rn-223: 7/2^? | Rn-224: 0^+ | Rn-225: 7/2^- | Rn-226: 0^+ | Rn-227: 5/2^+ | Rn-228: 0^+ unstable isotopes | Rn-222 (91.7639 h) | Rn-211 (14.6 h) | Rn-210 (140 min) | Rn-224 (107 min) | Rn-209 (28.5 min) | Rn-221 (25 min) | Rn-208 (24.35 min) | Rn-223 (24.33 min) | Rn-212 (23.9 min) | Rn-207 (9.25 min) | Rn-226 (7.33 min) | Rn-206 (5.67 min) | Rn-225 (4.67 min) | Rn-205 (170 s) | Rn-204 (70.2 s) | Rn-228 (65 s) | Rn-220 (55.6 s) | Rn-203 (43.5 s) | Rn-227 (20.8 s) | Rn-202 (9.7 s) | Rn-201 (7 s) | Rn-219 (3.96 s) | Rn-200 (1.03 s) | Rn-199 (590 ms) | Rn-198 (65 ms) | Rn-197 (66 ms) | Rn-218 (35 ms) | Rn-213 (19.5 ms) | Rn-195 (6 ms) | Rn-196 (4.4 ms) | Rn-217 (540 µs) | Rn-216 (45 µs) | Rn-215 (2.3 µs) | Rn-214 (270 ns) neutron cross-section | 0.7 b

CAS number | 10043-92-2 PubChem CID number | 24857 Gmelin number | 16242