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- |
Physical Properties | |
---|---|
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 | |
Arsenic is a Silver. As has a CPK of #ff1493, Jmol of #bd80e3, and MOLCAS GV of #bd80e3. The Appearance of Element 33 is metallic grey. The Refractive Index of Arsenic (As) is 1.001552. | |
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 | |
The Crystal Structure of Arsenic is RHL. The lattice constant of As is 4.13 Å. The lattice angles of Element 33 are π/2, π/2, 2 π/3. | |
Crystal Structure | Simple Trigonal (RHL) |
Lattice Constant | 4.13 Å
|
Lattice Angles | π/2, π/2, 2 π/3 |
Mechanical Properties | |
Arsenic has a Brinell of 1440 MPa, and Mohs hardness of 3.5 MPa. The Bulk Modulus of As is 22 GPa. The Young Modulus of Element 33 is 8 GPa. | |
Hardness | 3.5 MPa
|
Bulk Modulus | 22 GPa
|
Shear Modulus | |
Young Modulus | 8 GPa
|
Poisson Ratio | |
Speed of Sound | |
Classification | |
The CAS Group of Arsenic is VB. The IUPAC Group of As is VA. The Glawe Number of Element 33 is 90. The Mendeleev Number of Arsenic (As) is 95. The Pettifor Number of Arsenic is 89. The Geochemical Class of As is semi-volatile. The Goldschmidt Class of Element 33 is chalcophile. | |
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 | |
The Dipole Polarizability of Arsenic is 30 plus or minus 1 a₀. As has a C6 Dispersion Coefficient (CD) of 246 a₀, and C6 Dispersion Coefficient (GB) of 260 a₀. The Allotropes of Element 33 are Yellow Arsenic, Black Arsenic, Gray Arsenic. The Neutron Cross Section of Arsenic (As) is 4.2. The Neutron Mass Absorption of Arsenic is 0.002. The Quantum Numbers of As is 4S3/2. The Space Group of Element 33 is 166 (R_3m). | |
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 |