Atomic Number | 33 |
---|---|
Atomic Weight | 74.921595 |
Mass Number | 75 |
Group | 15 |
---|---|
Period | 4 |
Block | p |
Protons | 33 p+ |
---|---|
Neutrons | 42 n0 |
Electrons | 33 e- |
Atomic Radius | 115 pm
|
---|---|
Molar Volume | 13.1 cm³/mol
|
Covalent Radius | 121 pm
|
Metallic Radius | 121 pm
|
Ionic Radius | 58 pm
|
Crystal Radius | 72 pm
|
Van der Waals Radius | 185 pm
|
Density | 5.75 g/cm³
|
Energy | |
Proton Affinity | |
Electron Affinity | 0.804 eV/particle
|
Ionization Energy | 9.789 eV/particle
|
Heat of Vaporization | 32.4 kJ/mol
|
Heat of Fusion | |
Heat of Formation | 302.5 kJ/mol
|
Electrons | |
Electron Shells | 2, 8, 18, 5 |
Valence Electrons | 5 |
Electron Configuration | [Ar] 3d10 4s2 4p3 |
Oxidation States | -3, -2, -1, 0, 1, 2, 3, 4, 5 |
Electronegativity | 2.18
|
Electrophilicity | 1.5610969532554257 eV/particle
|
Phases | |
Phase | Solid |
Gas Phase | |
Boiling Point | 889.15 K
|
Melting Point | 1,090.15 K
|
Critical Pressure | 22.3 MPa
|
Critical Temperature | 1,673.15 K
|
Triple Point | |
Visual | |
Color | Silver
|
Appearance | metallic grey |
Refractive Index | 1.001552
|
Thermodynamic Properties | |
Thermal Conductivity | |
Thermal Expansion | |
Molar Heat Capacity | 24.64 J/(mol K)
|
Specific Heat Capacity | 0.329 J/(g⋅K)
|
Heat Capacity Ratio (Adiabatic Index) | |
Electrical Properties | |
Type | Conductor |
Electrical Conductivity | 3.3 MS/m
|
Electrical Resistivity | 0.0000003 m Ω
|
Superconducting Point | |
Magnetism | |
Type | diamagnetic |
Magnetic Susceptibility (Mass) | -0.0000000039 m³/Kg
|
Magnetic Susceptibility (Molar) | -0.000000000292 m³/mol
|
Magnetic Susceptibility (Volume) | -0.0000223
|
Magnetic Ordering | |
Curie Point | |
Neel Point | |
Structure | |
Crystal Structure | Simple Trigonal (RHL) |
Lattice Constant | 4.13 Å
|
Lattice Angles | π/2, π/2, 2 π/3 |
Mechanical Properties | |
Hardness | 3.5 MPa
|
Bulk Modulus | 22 GPa
|
Shear Modulus | |
Young Modulus | 8 GPa
|
Poisson Ratio | |
Speed of Sound | |
Classification | |
Category | Metalloids, Metalloids |
CAS Group | VB |
IUPAC Group | VA |
Glawe Number | 90 |
Mendeleev Number | 95 |
Pettifor Number | 89 |
Geochemical Class | semi-volatile |
Goldschmidt Class | chalcophile |
Other | |
Gas Basicity | |
Dipole Polarizability | |
C6 Dispersion Coefficient | 246 a₀
|
Allotropes | Yellow Arsenic, Black Arsenic, Gray Arsenic |
Neutron Cross Section | 4.2
|
Neutron Mass Absorption | 0.002
|
Quantum Numbers | 4S3/2 |
Space Group | 166 (R_3m) |
Stable Isotopes | 1 |
---|---|
Unstable Isotopes | 32 |
Radioactive Isotopes | 28 |
Abundance | |
---|---|
Relative Atomic Mass | |
Mass Number | 60 |
G-Factor | |
Half Life | |
Spin | 5 |
Quadrupole Moment | |
Discovery Year | |
Parity | + |
Decay Mode | Intensity |
---|---|
p (proton emission) | % |
Abundance | |
---|---|
Relative Atomic Mass | |
Mass Number | 61 |
G-Factor | |
Half Life | |
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | |
Parity | - |
Decay Mode | Intensity |
---|---|
p (proton emission) | % |
Abundance | |
---|---|
Relative Atomic Mass | |
Mass Number | 62 |
G-Factor | |
Half Life | |
Spin | 1 |
Quadrupole Moment | |
Discovery Year | |
Parity | + |
Decay Mode | Intensity |
---|---|
p (proton emission) | % |
Abundance | |
---|---|
Relative Atomic Mass | |
Mass Number | 63 |
G-Factor | |
Half Life | |
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | |
Parity | - |
Decay Mode | Intensity |
---|---|
p (proton emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 64 |
G-Factor | 0
|
Half Life | 69 ± 1.4 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1995 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 65 |
G-Factor | |
Half Life | 130.3 ± 0.6 ms
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1991 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 66 |
G-Factor | 0
|
Half Life | 95.77 ± 0.23 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1978 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 67 |
G-Factor | |
Half Life | 42.5 ± 1.2 s
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1980 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 68 |
G-Factor | |
Half Life | 151.6 ± 0.8 s
|
Spin | 3 |
Quadrupole Moment | |
Discovery Year | 1971 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 69 |
G-Factor | 0.6488 ± 0.0008
|
Half Life | 15.2 ± 0.2 m
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1955 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 70 |
G-Factor | 0.5276 ± 0.000125
|
Half Life | 52.6 ± 0.3 m
|
Spin | 4 |
Quadrupole Moment | 0.09 ± 0.02
|
Discovery Year | 1950 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 71 |
G-Factor | 0.6692 ± 0.0008
|
Half Life | 65.3 ± 0.07 h
|
Spin | 5/2 |
Quadrupole Moment | -0.021 ± 0.006
|
Discovery Year | 1939 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 72 |
G-Factor | -1.0805 ± 0.0003
|
Half Life | 26 ± 0.1 h
|
Spin | 2 |
Quadrupole Moment | -0.08 ± 0.02
|
Discovery Year | 1939 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 73 |
G-Factor | |
Half Life | 80.3 ± 0.06 d
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1948 |
Parity | - |
Decay Mode | Intensity |
---|---|
ϵ (electron capture) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 74 |
G-Factor | -0.798 ± 0.0015
|
Half Life | 17.77 ± 0.02 d
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 1938 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 66% |
β− (β− decay) | 34% |
Abundance | 100
|
---|---|
Relative Atomic Mass | |
Mass Number | 75 |
G-Factor | |
Half Life | |
Spin | 3/2 |
Quadrupole Moment | 0.311 ± 0.002
|
Discovery Year | 1920 |
Parity | - |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 76 |
G-Factor | 0.45115 ± 0.0005
|
Half Life | 1.0933 ± 0.0038 d
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 1934 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 77 |
G-Factor | 0.86266666666667 ± 0.00086666666666667
|
Half Life | 38.79 ± 0.05 h
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1951 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 78 |
G-Factor | |
Half Life | 90.7 ± 0.2 m
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 1937 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 79 |
G-Factor | |
Half Life | 9.01 ± 0.15 m
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1950 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 80 |
G-Factor | |
Half Life | 15.2 ± 0.2 s
|
Spin | 1 |
Quadrupole Moment | |
Discovery Year | 1954 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 81 |
G-Factor | |
Half Life | 33.3 ± 0.8 s
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1960 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 82 |
G-Factor | |
Half Life | 19.1 ± 0.5 s
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 1968 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 83 |
G-Factor | |
Half Life | 13.4 ± 0.4 s
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1968 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 84 |
G-Factor | |
Half Life | 3.16 ± 0.58 s
|
Spin | 2 |
Quadrupole Moment | |
Discovery Year | 1968 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 0.28% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 85 |
G-Factor | |
Half Life | 2.022 ± 0.007 s
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1967 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 62.6% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 86 |
G-Factor | |
Half Life | 945 ± 8 ms
|
Spin | 1 |
Quadrupole Moment | |
Discovery Year | 1973 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 35.5% |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 87 |
G-Factor | |
Half Life | 492 ± 25 ms
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1970 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 15.4% |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 88 |
G-Factor | |
Half Life | 270 ± 150 ms
|
Spin | |
Quadrupole Moment | |
Discovery Year | 1994 |
Parity |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 89 |
G-Factor | |
Half Life | |
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1994 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | % |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 90 |
G-Factor | |
Half Life | |
Spin | |
Quadrupole Moment | |
Discovery Year | 1997 |
Parity |
Decay Mode | Intensity |
---|---|
β− (β− decay) | % |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 91 |
G-Factor | |
Half Life | |
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1997 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | % |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 92 |
G-Factor | |
Half Life | |
Spin | |
Quadrupole Moment | |
Discovery Year | 1997 |
Parity |
Decay Mode | Intensity |
---|---|
β− (β− decay) | % |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
Greek historian Olympiodorus of Thebes roasted arsenic sulfide and obtained white arsenic during 5th century AD. Albertus Magnus is believed to have been the first to isolate the element from a compound in 1250, by heating soap together with arsenic trisulfide. In 1649, Johann Schröder published two ways of preparing arsenic. From the Latin word arsenicum, Greek arsenikon
Discoverers | Known to the ancients. |
---|---|
Discovery Location | |
Discovery Year | |
Etymology (Name Origin) | Greek: arsenikon; Latin: arsenicum, (both names for yellow pigment). |
Pronunciation | AR-s'n-ik (English) |
1 | s | 0.7217 |
2 | p | 3.9264 |
2 | s | 8.873 |
3 | d | 15.6216 |
3 | p | 15.1503 |
3 | s | 14.4045 |
4 | p | 25.5508 |
4 | s | 24.056 |