Technical data for Tin

Overview Name Tin Symbol Sn Atomic Number 50 Atomic Weight 118.71 Density 7.31 g/cm3 Melting Point 231.93 °C Boiling Point 2602 °C Thermal properties Phase Solid Melting Point 231.93 °C Boiling Point 2602 °C Absolute Melting Point 505.08 K Absolute Boiling Point 2875 K Critical Pressure N/A Critical Temperature N/A Heat of Fusion 7 kJ/mol Heat of Vaporization 290 kJ/mol Heat of Combustion {"N/A", "N/A"} J/(kg K) Specific Heat 217 J/(kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 67 W/(m K) Thermal Expansion 0.000022 K-1 Bulk physical properties Density 7.31 g/cm3 Density (Liquid) 6.99 g/cm3 Molar Volume 0.000016239 Brinell Hardness 51 MPa Mohs Hardness 1.5 MPa Vickers Hardness N/A Bulk Modulus 58 GPa Shear Modulus 18 GPa Young Modulus 50 GPa Poisson Ratio 0.36 Refractive Index N/A Speed of Sound 2.5×103 m/s Thermal Conductivity 67 W/(m K) Thermal Expansion 0.000022 K-1 Reactivity Valence 4 Electronegativity 1.96 ElectronAffinity 107.3 kJ/mol Ionization Energies 708.6, 1411.8, 2943, 3930.3, 7456 kJ/mol Health and Safety Autoignition Point N/A Flashpoint N/A[note] Heat of Combustion {"N/A", "N/A"} J/(kg K) DOT Hazard Class {N/A, N/A} DOT Numbers "N/A", "N/A" EU Number {N/A, N/A} NFPA Fire Rating {N/A, 3} NFPA Hazards N/ A, N/ A NFPA Health Rating {N/A, 1} NFPA Reactivity Rating {N/A, 3} RTECS Number {N/A, RTECSXP7320000} NFPA Label [note]

Classifications Alternate Names Stannum Names of Allotropes WhiteTin, GrayTin Block p Group 14 Period 5 Electron Configuration [Kr]4d105s25p2 Color Silver Discovery 3000 BC Gas phase N/A CAS Number CAS7440-31-5 CID Number {CID5352426, CID5352426} Gmelin Number {N/A, N/A} NSC Number {N/A, N/A} RTECS Number {N/A, RTECSXP7320000} Electrical properties Electrical Type Conductor Electrical Conductivity 9.1×106 S/m Resistivity 1.1×10-7 m Ω Superconducting Point 3.72 Magnetic properties Magnetic Type Diamagnetic Curie Point N/A Mass Magnetic Susceptibility -3.1×10-9 Molar Magnetic Susceptibility -3.68×10-10 Volume Magnetic Susceptibility -0.0000227 Abundances % in Universe 4×10-7% % in Sun 9×10-7% % in Meteorites 0.00012% % in Earth's Crust 0.00022% % in Oceans 1×10-9% % in Humans 0.00002% Atomic dimensions and structure Atomic Radius 145 pm Covalent Radius 141 pm Van der Waals Radius 217 pm Crystal Structure Centered Tetragonal Lattice Angles π/2, π/2, π/2 Lattice Constants 583.18, 583.18, 318.19 pm Space Group Name I41/amd Space Group Number 141 Nuclear Properties Half-Life Stable Lifetime Stable Decay Mode N/A Quantum Numbers 3P0 Neutron Cross Section 0.63 Neutron Mass Absorption 0.0002 Known Isotopes 99Sn, 100Sn, 101Sn, 102Sn, 103Sn, 104Sn, 105Sn, 106Sn, 107Sn, 108Sn, 109Sn, 110Sn, 111Sn, 112Sn, 113Sn, 114Sn, 115Sn, 116Sn, 117Sn, 118Sn, 119Sn, 120Sn, 121Sn, 122Sn, 123Sn, 124Sn, 125Sn, 126Sn, 127Sn, 128Sn, 129Sn, 130Sn, 131Sn, 132Sn, 133Sn, 134Sn, 135Sn, 136Sn, 137Sn Stable Isotopes 112Sn, 114Sn, 115Sn, 116Sn, 117Sn, 118Sn, 119Sn, 120Sn, 122Sn, 124Sn Isotopic Abundances 112Sn 0.97% 114Sn 0.66% 115Sn 0.34% 116Sn 14.54% 117Sn 7.68% 118Sn 24.22% 119Sn 8.59% 120Sn 32.58% 122Sn 4.63% 124Sn 5.79%