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argon

Input interpretation

argon (chemical element)
argon (chemical element)

Periodic table location

Periodic table location
Periodic table location

Image

Image
Image

Basic elemental properties

atomic symbol | Ar atomic number | 18 short electronic configuration | [Ne]3s^23p^6 Aufbau diagram | 3p 3s block | p group | 18 period | 3 atomic mass | 39.948 u (unified atomic mass units)
atomic symbol | Ar atomic number | 18 short electronic configuration | [Ne]3s^23p^6 Aufbau diagram | 3p 3s block | p group | 18 period | 3 atomic mass | 39.948 u (unified atomic mass units)

Thermodynamic properties

phase at STP | gas melting point | -189.3 °C (rank: 96th) boiling point | -185.8 °C (rank: 89th) critical temperature | 150.87 K (rank: 16th) critical pressure | 4.898 MPa (rank: 17th) molar heat of fusion | 1.18 kJ/mol (rank: 86th) molar heat of vaporization | 6.5 kJ/mol (rank: 88th) specific heat at STP | 520.33 J/(kg K) (rank: 21st) adiabatic index | 5/3 (rank: 1st) (properties at standard conditions)
phase at STP | gas melting point | -189.3 °C (rank: 96th) boiling point | -185.8 °C (rank: 89th) critical temperature | 150.87 K (rank: 16th) critical pressure | 4.898 MPa (rank: 17th) molar heat of fusion | 1.18 kJ/mol (rank: 86th) molar heat of vaporization | 6.5 kJ/mol (rank: 88th) specific heat at STP | 520.33 J/(kg K) (rank: 21st) adiabatic index | 5/3 (rank: 1st) (properties at standard conditions)

Material properties

density | 0.001784 g/cm^3 (rank: 90th) molar volume | 22390 cm^3/mol refractive index | 1.000281 sound speed | 319 m/s (rank: 70th) thermal conductivity | 0.01772 W/(m K) (rank: 90th) (properties at standard conditions)
density | 0.001784 g/cm^3 (rank: 90th) molar volume | 22390 cm^3/mol refractive index | 1.000281 sound speed | 319 m/s (rank: 70th) thermal conductivity | 0.01772 W/(m K) (rank: 90th) (properties at standard conditions)

Electromagnetic properties

magnetic type | diamagnetic volume magnetic susceptibility | -1.07×10^-8 mass magnetic susceptibility | -6×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -2.4×10^-10 m^3/mol (cubic meters per mole) color | (colorless) refractive index | 1.000281
magnetic type | diamagnetic volume magnetic susceptibility | -1.07×10^-8 mass magnetic susceptibility | -6×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -2.4×10^-10 m^3/mol (cubic meters per mole) color | (colorless) refractive index | 1.000281

Reactivity

valence | 0 electron affinity | 0 kJ/mol (kilojoules per mole) first ionization energy | 1520.6 kJ/mol (kilojoules per mole) ionization energies | 1520.6 kJ/mol | 2665.8 kJ/mol | 3931 kJ/mol | 5771 kJ/mol | 7238 kJ/mol | 8781 kJ/mol | 11995 kJ/mol | 13842 kJ/mol | 40760 kJ/mol | 46186 kJ/mol
valence | 0 electron affinity | 0 kJ/mol (kilojoules per mole) first ionization energy | 1520.6 kJ/mol (kilojoules per mole) ionization energies | 1520.6 kJ/mol | 2665.8 kJ/mol | 3931 kJ/mol | 5771 kJ/mol | 7238 kJ/mol | 8781 kJ/mol | 11995 kJ/mol | 13842 kJ/mol | 40760 kJ/mol | 46186 kJ/mol
Reactivity
Reactivity

Atomic properties

term symbol | ^1S_0 atomic radius | 71 pm covalent radius | 106 pm van der Waals radius | 188 pm (electronic ground state properties)
term symbol | ^1S_0 atomic radius | 71 pm covalent radius | 106 pm van der Waals radius | 188 pm (electronic ground state properties)
(neutral argon atomic spectrum)
(neutral argon atomic spectrum)

Abundances

universe abundance | 0.02 mass% (rank: 11th) solar abundance | 0.007 mass% (rank: 12th) crust abundance | 1.5×10^-4 mass% (rank: 54th) ocean abundance | 4.5×10^-5 mass% (rank: 16th) universe molar abundance | 6×10^-4 mol% (rank: 11th) solar molar abundance | 2×10^-4 mol% (rank: 15th) ocean molar abundance | 7×10^-6 mol% (rank: 18th) crust molar abundance | 7.8×10^-5 mol% (rank: 43rd)
universe abundance | 0.02 mass% (rank: 11th) solar abundance | 0.007 mass% (rank: 12th) crust abundance | 1.5×10^-4 mass% (rank: 54th) ocean abundance | 4.5×10^-5 mass% (rank: 16th) universe molar abundance | 6×10^-4 mol% (rank: 11th) solar molar abundance | 2×10^-4 mol% (rank: 15th) ocean molar abundance | 7×10^-6 mol% (rank: 18th) crust molar abundance | 7.8×10^-5 mol% (rank: 43rd)

Nuclear properties

half-life | (stable) stable isotopes | Ar-40 (99.6003%) | Ar-36 (0.3365%) | Ar-38 (6.32×10^-4) nuclear spin | Ar-30: 0^+ | Ar-31: 5/2^+ | Ar-32: 0^+ | Ar-33: 1/2^+ | Ar-34: 0^+ | Ar-35: 3/2^+ | Ar-36: 0^+ | Ar-37: 3/2^+ | Ar-38: 0^+ | Ar-39: 7/2^- | Ar-40: 0^+ | Ar-41: 7/2^- | Ar-42: 0^+ | Ar-43: 5/2^- | Ar-44: 0^+ | Ar-46: 0^+ | Ar-47: 3/2^- | Ar-48: 0^+ | Ar-49: 3/2^- | Ar-50: 0^+ | Ar-51: 3/2^- | Ar-52: 0^+ | Ar-53: 5/2^- unstable isotopes | Ar-39 (269 yr) | Ar-42 (33 yr) | Ar-37 (34.95 days) | Ar-41 (109.61 min) | Ar-44 (11.87 min) | Ar-43 (5.37 min) | Ar-45 (21.48 s) | Ar-46 (8.4 s) | Ar-35 (1.775 s) | Ar-47 (1.23 s) | Ar-34 (845 ms) | Ar-48 (475 ms) | Ar-33 (173 ms) | Ar-49 (170 ms) | Ar-32 (98 ms) | Ar-31 (14.4 ms) | Ar-52 (10 ms) | Ar-53 (3 ms) | Ar-51 (200 ns) | Ar-50 (170 ns) | Ar-30 (20 ns) neutron cross-section | 0.65 b neutron mass absorption | 6×10^-4 m^2/kg
half-life | (stable) stable isotopes | Ar-40 (99.6003%) | Ar-36 (0.3365%) | Ar-38 (6.32×10^-4) nuclear spin | Ar-30: 0^+ | Ar-31: 5/2^+ | Ar-32: 0^+ | Ar-33: 1/2^+ | Ar-34: 0^+ | Ar-35: 3/2^+ | Ar-36: 0^+ | Ar-37: 3/2^+ | Ar-38: 0^+ | Ar-39: 7/2^- | Ar-40: 0^+ | Ar-41: 7/2^- | Ar-42: 0^+ | Ar-43: 5/2^- | Ar-44: 0^+ | Ar-46: 0^+ | Ar-47: 3/2^- | Ar-48: 0^+ | Ar-49: 3/2^- | Ar-50: 0^+ | Ar-51: 3/2^- | Ar-52: 0^+ | Ar-53: 5/2^- unstable isotopes | Ar-39 (269 yr) | Ar-42 (33 yr) | Ar-37 (34.95 days) | Ar-41 (109.61 min) | Ar-44 (11.87 min) | Ar-43 (5.37 min) | Ar-45 (21.48 s) | Ar-46 (8.4 s) | Ar-35 (1.775 s) | Ar-47 (1.23 s) | Ar-34 (845 ms) | Ar-48 (475 ms) | Ar-33 (173 ms) | Ar-49 (170 ms) | Ar-32 (98 ms) | Ar-31 (14.4 ms) | Ar-52 (10 ms) | Ar-53 (3 ms) | Ar-51 (200 ns) | Ar-50 (170 ns) | Ar-30 (20 ns) neutron cross-section | 0.65 b neutron mass absorption | 6×10^-4 m^2/kg

Identifiers

CAS number | 7440-37-1 PubChem CID number | 23968
CAS number | 7440-37-1 PubChem CID number | 23968

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