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arsenic

Input interpretation

arsenic (chemical element)
arsenic (chemical element)

Periodic table location

Periodic table location
Periodic table location

Image

Image
Image

Basic elemental properties

atomic symbol | As atomic number | 33 short electronic configuration | [Ar]4s^23d^104p^3 Aufbau diagram | 4p 3d 4s block | p group | 15 period | 4 atomic mass | 74.921595 u (unified atomic mass units)
atomic symbol | As atomic number | 33 short electronic configuration | [Ar]4s^23d^104p^3 Aufbau diagram | 4p 3d 4s block | p group | 15 period | 4 atomic mass | 74.921595 u (unified atomic mass units)

Thermodynamic properties

phase at STP | solid | melting point | gray arsenic | 817 °C boiling point | gray arsenic | 616 °C critical temperature | gray arsenic | 1673 K molar heat of fusion | gray arsenic | 24.44 kJ/mol molar heat of vaporization | 32.4 kJ/mol (rank: 78th) | specific heat at STP | 328 J/(kg K) (rank: 35th) | (properties at standard conditions)
phase at STP | solid | melting point | gray arsenic | 817 °C boiling point | gray arsenic | 616 °C critical temperature | gray arsenic | 1673 K molar heat of fusion | gray arsenic | 24.44 kJ/mol molar heat of vaporization | 32.4 kJ/mol (rank: 78th) | specific heat at STP | 328 J/(kg K) (rank: 35th) | (properties at standard conditions)

Material properties

density | yellow arsenic | 1.97 g/cm^3 | black arsenic | 4.9 g/cm^3 | gray arsenic | 5.727 g/cm^3 liquid density | 5.22 g/cm^3 | molar volume | 13.08 cm^3/mol | Mohs hardness | 3.5 (between calcite and fluorite) | Vickers hardness | 1510 MPa (rank: 13th) | Brinell hardness | 1440 MPa (rank: 10th) | bulk modulus | 22 GPa (rank: 54th) | Young's modulus | 8 GPa (rank: 59th) | refractive index | 1.001552 | thermal conductivity | 50 W/(m K) (rank: 35th) | (properties at standard conditions)
density | yellow arsenic | 1.97 g/cm^3 | black arsenic | 4.9 g/cm^3 | gray arsenic | 5.727 g/cm^3 liquid density | 5.22 g/cm^3 | molar volume | 13.08 cm^3/mol | Mohs hardness | 3.5 (between calcite and fluorite) | Vickers hardness | 1510 MPa (rank: 13th) | Brinell hardness | 1440 MPa (rank: 10th) | bulk modulus | 22 GPa (rank: 54th) | Young's modulus | 8 GPa (rank: 59th) | refractive index | 1.001552 | thermal conductivity | 50 W/(m K) (rank: 35th) | (properties at standard conditions)

Electromagnetic properties

electrical type | conductor | resistivity | 3×10^-7 Ω m (ohm meters) | electrical conductivity | 3.3×10^6 S/m (siemens per meter) | magnetic type | diamagnetic | volume magnetic susceptibility | -2.23×10^-5 | mass magnetic susceptibility | -3.9×10^-9 m^3/kg (cubic meters per kilogram) | molar magnetic susceptibility | -2.92×10^-10 m^3/mol (cubic meters per mole) | work function | 3.75 eV (Polycrystalline) | threshold frequency | 9.067×10^14 Hz (hertz) | color | (silver) | refractive index | gray arsenic | 1.001552
electrical type | conductor | resistivity | 3×10^-7 Ω m (ohm meters) | electrical conductivity | 3.3×10^6 S/m (siemens per meter) | magnetic type | diamagnetic | volume magnetic susceptibility | -2.23×10^-5 | mass magnetic susceptibility | -3.9×10^-9 m^3/kg (cubic meters per kilogram) | molar magnetic susceptibility | -2.92×10^-10 m^3/mol (cubic meters per mole) | work function | 3.75 eV (Polycrystalline) | threshold frequency | 9.067×10^14 Hz (hertz) | color | (silver) | refractive index | gray arsenic | 1.001552

Reactivity

valence | 5 electronegativity | 2.18 electron affinity | 78 kJ/mol (kilojoules per mole) first ionization energy | 947 kJ/mol (kilojoules per mole) ionization energies | 947 kJ/mol | 1798 kJ/mol | 2735 kJ/mol | 4837 kJ/mol | 6043 kJ/mol | 12310 kJ/mol
valence | 5 electronegativity | 2.18 electron affinity | 78 kJ/mol (kilojoules per mole) first ionization energy | 947 kJ/mol (kilojoules per mole) ionization energies | 947 kJ/mol | 1798 kJ/mol | 2735 kJ/mol | 4837 kJ/mol | 6043 kJ/mol | 12310 kJ/mol
Reactivity
Reactivity

Atomic properties

term symbol | ^4S_(3/2) atomic radius | 115 pm covalent radius | 119 pm van der Waals radius | 185 pm (electronic ground state properties)
term symbol | ^4S_(3/2) atomic radius | 115 pm covalent radius | 119 pm van der Waals radius | 185 pm (electronic ground state properties)
(neutral arsenic atomic spectrum)
(neutral arsenic atomic spectrum)

Abundances

universe abundance | 8×10^-7 mass% (rank: 41st) meteorite abundance | 1.8×10^-4 mass% (rank: 34th) crust abundance | 2.1×10^-4 mass% (rank: 48th) ocean abundance | 2.3×10^-7 mass% (rank: 28th) human abundance | 5×10^-6 mass% (rank: 33rd) universe molar abundance | 1×10^-8 mol% (rank: 35th) meteorite molar abundance | 4.6×10^-5 mol% (rank: 33rd) ocean molar abundance | 1.9×10^-8 mol% (rank: 40th) crust molar abundance | 5.8×10^-5 mol% (rank: 45th) human molar abundance | 4×10^-7 mol% (rank: 32nd)
universe abundance | 8×10^-7 mass% (rank: 41st) meteorite abundance | 1.8×10^-4 mass% (rank: 34th) crust abundance | 2.1×10^-4 mass% (rank: 48th) ocean abundance | 2.3×10^-7 mass% (rank: 28th) human abundance | 5×10^-6 mass% (rank: 33rd) universe molar abundance | 1×10^-8 mol% (rank: 35th) meteorite molar abundance | 4.6×10^-5 mol% (rank: 33rd) ocean molar abundance | 1.9×10^-8 mol% (rank: 40th) crust molar abundance | 5.8×10^-5 mol% (rank: 45th) human molar abundance | 4×10^-7 mol% (rank: 32nd)

Nuclear properties

half-life | (stable) stable isotopes | As-75 (100%) nuclear spin | As-60: 5^+ | As-61: 3/2^- | As-62: 1^+ | As-63: 3/2^- | As-64: 0^+ | As-65: 3/2^- | As-66: 0^+ | As-67: 5/2^- | As-68: 3^+ | As-69: 5/2^- | As-70: 4^+ | As-71: 5/2^- | As-72: 2^- | As-73: 3/2^- | As-74: 2^- | As-75: 3/2^- | As-76: 2^- | As-77: 3/2^- | As-78: 2^- | As-79: 3/2^- | As-80: 1^+ | As-81: 3/2^- | As-82: 1^+ | As-84: 3^- | As-85: 3/2^- | As-87: 3/2^- | As-89: 3/2^- | As-91: 3/2^- unstable isotopes | As-73 (80.3 days) | As-74 (17.77 days) | As-71 (65.3 h) | As-77 (38.83 h) | As-76 (26.261 h) | As-72 (26 h) | As-78 (90.67 min) | As-70 (52.67 min) | As-69 (15.2 min) | As-79 (9.02 min) | As-68 (151.6 s) | As-67 (42.5 s) | As-81 (33.3 s) | As-82 (19.1 s) | As-80 (15.2 s) | As-83 (13.4 s) | As-84 (3.24 s) | As-85 (2.021 s) | As-86 (945 ms) | As-87 (560 ms) | As-65 (128 ms) | As-66 (95.77 ms) | As-90 (80 ms) | As-64 (18 ms) | As-92 (300 ns) | As-89 (300 ns) | As-88 (300 ns) | As-91 (150 ns) neutron cross-section | 4.3 b neutron mass absorption | 0.002 m^2/kg
half-life | (stable) stable isotopes | As-75 (100%) nuclear spin | As-60: 5^+ | As-61: 3/2^- | As-62: 1^+ | As-63: 3/2^- | As-64: 0^+ | As-65: 3/2^- | As-66: 0^+ | As-67: 5/2^- | As-68: 3^+ | As-69: 5/2^- | As-70: 4^+ | As-71: 5/2^- | As-72: 2^- | As-73: 3/2^- | As-74: 2^- | As-75: 3/2^- | As-76: 2^- | As-77: 3/2^- | As-78: 2^- | As-79: 3/2^- | As-80: 1^+ | As-81: 3/2^- | As-82: 1^+ | As-84: 3^- | As-85: 3/2^- | As-87: 3/2^- | As-89: 3/2^- | As-91: 3/2^- unstable isotopes | As-73 (80.3 days) | As-74 (17.77 days) | As-71 (65.3 h) | As-77 (38.83 h) | As-76 (26.261 h) | As-72 (26 h) | As-78 (90.67 min) | As-70 (52.67 min) | As-69 (15.2 min) | As-79 (9.02 min) | As-68 (151.6 s) | As-67 (42.5 s) | As-81 (33.3 s) | As-82 (19.1 s) | As-80 (15.2 s) | As-83 (13.4 s) | As-84 (3.24 s) | As-85 (2.021 s) | As-86 (945 ms) | As-87 (560 ms) | As-65 (128 ms) | As-66 (95.77 ms) | As-90 (80 ms) | As-64 (18 ms) | As-92 (300 ns) | As-89 (300 ns) | As-88 (300 ns) | As-91 (150 ns) neutron cross-section | 4.3 b neutron mass absorption | 0.002 m^2/kg

Identifiers

CAS number | 7440-38-2
CAS number | 7440-38-2

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