Input interpretation
cesium (chemical element)
Periodic table location
Periodic table location
Image
Image
Basic elemental properties
![atomic symbol | Cs atomic number | 55 short electronic configuration | [Xe]6s^1 Aufbau diagram | 6s block | s group | 1 period | 6 atomic mass | 132.90545196 u (unified atomic mass units)](../image_source/4c8d010d4c511c50445415853de08583.png)
atomic symbol | Cs atomic number | 55 short electronic configuration | [Xe]6s^1 Aufbau diagram | 6s block | s group | 1 period | 6 atomic mass | 132.90545196 u (unified atomic mass units)
Thermodynamic properties
phase at STP | solid melting point | 28.44 °C (rank: 89th) boiling point | 671 °C (rank: 77th) critical temperature | 1938 K (rank: 5th) critical pressure | 9.4 MPa (rank: 10th) molar heat of fusion | 2.09 kJ/mol (rank: 82nd) molar heat of vaporization | 65 kJ/mol (rank: 73rd) specific heat at STP | 242 J/(kg K) (rank: 44th) (properties at standard conditions)
Material properties
density | 1.879 g/cm^3 (rank: 77th) liquid density | 1.843 g/cm^3 molar volume | 70.73 cm^3/mol Mohs hardness | 0.2 (between talc and gypsum) Brinell hardness | 0.14 MPa (rank: 60th) bulk modulus | 1.6 GPa (rank: 68th) Young's modulus | 1.7 GPa (rank: 63rd) thermal conductivity | 36 W/(m K) (rank: 40th) (properties at standard conditions)
Electromagnetic properties
electrical type | conductor resistivity | 2×10^-7 Ω m (ohm meters) electrical conductivity | 5×10^6 S/m (siemens per meter) magnetic type | paramagnetic volume magnetic susceptibility | 5.26×10^-6 mass magnetic susceptibility | 2.8×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 3.72×10^-10 m^3/mol (cubic meters per mole) work function | 1.95 eV (Polycrystalline) threshold frequency | 4.715×10^14 Hz (hertz) color | (yellow)
Reactivity
valence | 1 electronegativity | 0.79 electron affinity | 45.5 kJ/mol (kilojoules per mole) first ionization energy | 375.7 kJ/mol (kilojoules per mole) ionization energies | 375.7 kJ/mol | 2234.3 kJ/mol | 3400 kJ/mol
Reactivity
Atomic properties
term symbol | ^2S_(1/2) atomic radius | 260 pm covalent radius | 244 pm (electronic ground state properties)
(neutral cesium atomic spectrum)
Abundances
universe abundance | 8×10^-8 mass% (rank: 65th) solar abundance | 8×10^-7 mass% (rank: 41st) meteorite abundance | 1.4×10^-5 mass% (rank: 62nd) crust abundance | 1.9×10^-4 mass% (rank: 50th) ocean abundance | 5×10^-8 mass% (rank: 34th) human abundance | 2×10^-6 mass% (rank: 37th) universe molar abundance | 1×10^-9 mol% (rank: 59th) solar molar abundance | 7×10^-9 mol% (rank: 39th) meteorite molar abundance | 2×10^-6 mol% (rank: 56th) ocean molar abundance | 2.3×10^-9 mol% (rank: 47th) crust molar abundance | 2.9×10^-5 mol% (rank: 52nd) human molar abundance | 1×10^-7 mol% (rank: 39th)