Atomic Number | 86 |
---|---|
Atomic Weight | 222 |
Mass Number | 193 |
Group | 18 |
---|---|
Period | 6 |
Block | p |
Protons | 86 p+ |
---|---|
Neutrons | 107 n0 |
Electrons | 86 e- |
Atomic Radius | |
---|---|
Molar Volume | |
Covalent Radius | 142 pm
|
Metallic Radius | |
Ionic Radius | |
Crystal Radius | |
Van der Waals Radius |
220 pm
|
Density | 0.009074 g/cm³
|
Energy | |
Proton Affinity | |
Electron Affinity | |
Ionization Energy | 10.7485 eV/particle
|
Heat of Vaporization | 18.1 kJ/mol
|
Heat of Fusion | |
Heat of Formation | |
Electrons | |
Electron Shells | 2, 8, 18, 32, 18, 8 |
Valence Electrons | 8 |
Electron Configuration | [Xe] 4f14 5d10 6s2 6p6 |
Oxidation States | 2, 6 |
Electronegativity | |
Electrophilicity | |
Phases | |
Phase | Gas |
Gas Phase | Monoatomic |
Boiling Point | 211.45 K
|
Melting Point | 202.15 K
|
Critical Pressure | 6.28 MPa
|
Critical Temperature | 377.15 K
|
Triple Point | |
Visual | |
Color | Colorless
|
Appearance | colorless gas, occasionally glows green or red in discharge tubes |
Refractive Index | |
Thermodynamic Properties | |
Thermal Conductivity | 0.0036 W/(m K)
|
Thermal Expansion | |
Molar Heat Capacity | 20.786 J/(mol K)
|
Specific Heat Capacity | 0.094 J/(g⋅K)
|
Heat Capacity Ratio (Adiabatic Index) | 5/3 |
Electrical Properties | |
Type | |
Electrical Conductivity | |
Electrical Resistivity | |
Superconducting Point | |
Magnetism | |
Type | |
Magnetic Susceptibility (Mass) | |
Magnetic Susceptibility (Molar) | |
Magnetic Susceptibility (Volume) | |
Magnetic Ordering | |
Curie Point | |
Neel Point | |
Structure | |
Crystal Structure | (FCC) |
Lattice Constant | |
Lattice Angles | |
Mechanical Properties | |
Hardness | |
Bulk Modulus | |
Shear Modulus | |
Young Modulus | |
Poisson Ratio | |
Speed of Sound | |
Classification | |
Category | Noble gases, Noble gases |
CAS Group | VIII |
IUPAC Group | VIIIA |
Glawe Number | 6 |
Mendeleev Number | 117 |
Pettifor Number | 6 |
Geochemical Class | U/Th decay series |
Goldschmidt Class | synthetic |
Other | |
Gas Basicity | |
Dipole Polarizability | |
C6 Dispersion Coefficient | |
Allotropes | |
Neutron Cross Section | 0.7
|
Neutron Mass Absorption | |
Quantum Numbers | 1S0 |
Space Group | () |
Stable Isotopes | 0 |
---|---|
Unstable Isotopes | 39 |
Radioactive Isotopes | 39 |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 193 |
G-Factor | |
Half Life | 1.15 ± 0.27 ms
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 2006 |
Parity | - |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 194 |
G-Factor | 0
|
Half Life | 780 ± 160 us
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 2006 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 195 |
G-Factor | |
Half Life | 7 ± 3 ms
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 2001 |
Parity | - |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 196 |
G-Factor | 0
|
Half Life | 4.7 ± 1.1 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1995 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 197 |
G-Factor | |
Half Life | 54 ± 6 ms
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1995 |
Parity | - |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 198 |
G-Factor | 0
|
Half Life | 64.4 ± 1.6 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1984 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 93% |
β+ (β+ decay; β+ = ϵ + e+) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 199 |
G-Factor | |
Half Life | 590 ± 30 ms
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1980 |
Parity | - |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 200 |
G-Factor | 0
|
Half Life | 1.09 ± 0.16 s
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1971 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 92% |
β+ (β+ decay; β+ = ϵ + e+) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 201 |
G-Factor | |
Half Life | 7 ± 0.4 s
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1967 |
Parity | - |
Decay Mode | Intensity |
---|---|
α (α emission) | % |
β+ (β+ decay; β+ = ϵ + e+) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 202 |
G-Factor | 0
|
Half Life | 9.7 ± 0.1 s
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1967 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 78% |
β+ (β+ decay; β+ = ϵ + e+) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 203 |
G-Factor | |
Half Life | 44.2 ± 1.6 s
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1967 |
Parity | - |
Decay Mode | Intensity |
---|---|
α (α emission) | 66% |
β+ (β+ decay; β+ = ϵ + e+) | 34% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 204 |
G-Factor | 0
|
Half Life | 1.242 ± 0.023 m
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1967 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 72.4% |
β+ (β+ decay; β+ = ϵ + e+) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 205 |
G-Factor | 0.3192 ± 0.00064
|
Half Life | 170 ± 4 s
|
Spin | 5/2 |
Quadrupole Moment | 0.062 ± 0.006
|
Discovery Year | 1967 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 75.4% |
α (α emission) | 24.6% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 206 |
G-Factor | 0
|
Half Life | 5.67 ± 0.17 m
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1954 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 62% |
β+ (β+ decay; β+ = ϵ + e+) | 38% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 207 |
G-Factor | 0.32496 ± 0.00064
|
Half Life | 9.25 ± 0.17 m
|
Spin | 5/2 |
Quadrupole Moment | 0.22 ± 0.02
|
Discovery Year | 1954 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 79% |
α (α emission) | 21% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 208 |
G-Factor | 0
|
Half Life | 24.35 ± 0.14 m
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1955 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 62% |
β+ (β+ decay; β+ = ϵ + e+) | 38% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 209 |
G-Factor | |
Half Life | 28.8 ± 1 m
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1952 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 83% |
α (α emission) | 17% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 210 |
G-Factor | 0
|
Half Life | 2.4 ± 0.1 h
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1952 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 96% |
β+ (β+ decay; β+ = ϵ + e+) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 211 |
G-Factor | 1.1968 ± 0.0024
|
Half Life | 14.6 ± 0.2 h
|
Spin | 1/2 |
Quadrupole Moment | 0
|
Discovery Year | 1952 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 72.6% |
α (α emission) | 27.4% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 212 |
G-Factor | 0
|
Half Life | 23.9 ± 1.2 m
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1950 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 213 |
G-Factor | |
Half Life | 19.5 ± 0.1 ms
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1967 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 214 |
G-Factor | 0
|
Half Life | 259 ± 3 ns
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1970 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 215 |
G-Factor | |
Half Life | 2.3 ± 0.1 us
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1952 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 216 |
G-Factor | 0
|
Half Life | 29 ± 4 us
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1949 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 217 |
G-Factor | |
Half Life | 593 ± 38 us
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1949 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 218 |
G-Factor | 0
|
Half Life | 33.75 ± 0.15 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1948 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 219 |
G-Factor | -0.17596 ± 0.00048
|
Half Life | 3.96 ± 0.01 s
|
Spin | 5/2 |
Quadrupole Moment | 1.15 ± 0.12
|
Discovery Year | 1903 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 220 |
G-Factor | 0
|
Half Life | 55.6 ± 0.1 s
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1900 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
2β− (double β− decay) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 221 |
G-Factor | -0.0057428571428571 ± 0.00017142857142857
|
Half Life | 25.7 ± 0.5 m
|
Spin | 7/2 |
Quadrupole Moment | -0.47 ± 0.05
|
Discovery Year | 1956 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 78% |
α (α emission) | 22% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 222 |
G-Factor | 0
|
Half Life | 3.8215 ± 0.0002 d
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1899 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 223 |
G-Factor | -0.22057142857143 ± 0.0022857142857143
|
Half Life | 24.3 ± 0.4 m
|
Spin | 7/2 |
Quadrupole Moment | 0.8 ± 0.08
|
Discovery Year | 1964 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
α (α emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 224 |
G-Factor | 0
|
Half Life | 107 ± 3 m
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1964 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 225 |
G-Factor | -0.198 ± 0.0022857142857143
|
Half Life | 4.66 ± 0.04 m
|
Spin | 7/2 |
Quadrupole Moment | 0.84 ± 0.08
|
Discovery Year | 1969 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 226 |
G-Factor | 0
|
Half Life | 7.4 ± 0.1 m
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1969 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 227 |
G-Factor | |
Half Life | 20.2 ± 0.4 s
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1986 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 228 |
G-Factor | 0
|
Half Life | 65 ± 2 s
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1989 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 229 |
G-Factor | |
Half Life | 11.9 ± 1.3 s
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 2009 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 230 |
G-Factor | 0
|
Half Life | |
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 2010 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | % |
Radon was discovered in 1900 by Friedrich Ernst Dorn in Halle, Germany. He reported some experiments in which he noticed that radium compounds emanate a radioactive gas. In 1910, Sir William Ramsay and Robert Whytlaw-Gray isolated radon, determined its density, and determined that it was the heaviest known gas. The name was derived from radium; called niton at first, from the Latin word nitens meaning shining
Discoverers | Fredrich Ernst Dorn |
---|---|
Discovery Location | Germany |
Discovery Year | 1898 |
Etymology (Name Origin) | Variation of the name of another element, radium. |
Pronunciation | RAY-don (English) |
1 | s | 1.6659 |
2 | p | 4.562 |
2 | s | 22.5864 |
3 | d | 13.4027 |
3 | p | 23.7194 |
3 | s | 24.9149 |
4 | d | 38.0572 |
4 | f | 37.6688 |
4 | p | 36.6988 |
4 | s | 35.85 |
5 | d | 58.647 |
5 | p | 54.029 |
5 | s | 52.107 |
6 | p | 69.9242 |
6 | s | 67.676 |