Input interpretation
synthetic elements
Members
technetium | promethium | astatine | neptunium | plutonium | americium | curium | berkelium | californium | einsteinium | fermium | mendelevium | nobelium | lawrencium | rutherfordium | dubnium | seaborgium | bohrium | hassium | meitnerium | darmstadtium | roentgenium | copernicium | nihonium | flerovium | moscovium | livermorium | tennessine | oganesson (total: 29)
Periodic table location
Periodic table location
Images
Images
Basic elemental properties
atomic symbol | all | Am | At | Bh | Bk | Cf | Cm | Cn | Db | Ds | Es | Fl | Fm | Hs | Lr | Lv | Mc | Md | Mt | Nh | No | Np | Og | Pm | Pu | Rf | Rg | Sg | Tc | Ts atomic number | median | 104 | highest | 118 (oganesson) | lowest | 43 (technetium) | distribution | block | all | d | f | p group | all | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 period | all | 5 | 6 | 7 atomic mass | median | 267 u | highest | 294 u (oganesson) | lowest | 98 u (technetium) | distribution | half-life | median | 5.6 h | highest | 79 Myr (plutonium) | lowest | 5 ms (oganesson)
Thermodynamic properties
phase at STP | all | solid melting point | median | 975 °C | highest | 2157 °C (technetium) | lowest | 302 °C (astatine) | distribution | boiling point | median | 3170 °C | highest | 4265 °C (technetium) | lowest | 2011 °C (americium) | distribution | molar heat of fusion | median | 8.8 kJ/mol | highest | 23 kJ/mol (technetium) | lowest | 6 kJ/mol (astatine) | distribution | molar heat of vaporization | median | 325 kJ/mol | highest | 550 kJ/mol (technetium) | lowest | 40 kJ/mol (astatine) | distribution | (properties at standard conditions)
Material properties
density | median | 14.22 g/cm^3 | highest | 20.45 g/cm^3 (neptunium) | lowest | 7.264 g/cm^3 (promethium) | distribution | molar volume | median | 16.7 cm^3/mol | highest | 20 cm^3/mol (promethium) | lowest | 8.5 cm^3/mol (technetium) | distribution | Poisson ratio | all | 0.21 | 0.28 tensile yield strength | median | 275 MPa | highest | 1.29 GPa (technetium) | lowest | 70 MPa (promethium) ultimate tensile strength | all | 160 MPa | 400 MPa | 1.51 GPa thermal conductivity | median | 10 W/(m K) | highest | 51 W/(m K) (technetium) | lowest | 2 W/(m K) (astatine) | distribution | (properties at standard conditions)
Electromagnetic properties
resistivity | median | 9.7×10^-7 Ω m (ohm meters) | highest | 1.5×10^-6 Ω m (ohm meters) (plutonium) | lowest | 2×10^-7 Ω m (ohm meters) (technetium) | distribution | electrical conductivity | median | 1.1×10^6 S/m (siemens per meter) | highest | 5×10^6 S/m (siemens per meter) (technetium) | lowest | 670000 S/m (siemens per meter) (plutonium) | distribution | volume magnetic susceptibility | median | 6.282×10^-4 | highest | 7.04×10^-4 (americium) | lowest | 3.933×10^-4 (technetium) | distribution | mass magnetic susceptibility | median | 3.42×10^-8 m^3/kg (cubic meters per kilogram) | highest | 5.15×10^-8 m^3/kg (cubic meters per kilogram) (americium) | lowest | 3.17×10^-8 m^3/kg (cubic meters per kilogram) (plutonium) molar magnetic susceptibility | median | 7.735×10^-9 m^3/mol (cubic meters per mole) | highest | 1.251×10^-8 m^3/mol (cubic meters per mole) (americium) | lowest | 3.352×10^-9 m^3/mol (cubic meters per mole) (technetium) | distribution |
Reactivity
valence | median | 4 | highest | 7 (astatine and bohrium) | lowest | 3 (5 elements) | distribution | electronegativity | median | 1.3 | highest | 2.2 (astatine) | lowest | 1.28 (plutonium) | distribution | electron affinity | median | 53 kJ/mol (kilojoules per mole) | highest | 270.1 kJ/mol (kilojoules per mole) (astatine) | lowest | 50 kJ/mol (kilojoules per mole) (promethium) first ionization energy | median | 608 kJ/mol (kilojoules per mole) | highest | 920 kJ/mol (kilojoules per mole) (astatine) | lowest | 540 kJ/mol (kilojoules per mole) (promethium) | distribution |
Atomic properties
term symbol | all | ^1S_0 | ^2F_(7/2) | ^2P_(1/2) | ^2P_(3/2) | ^2S_(1/2) | ^3D_3 | ^3F_2 | ^3H_6 | ^3P_0 | ^3P_2 | ^4F_(3/2) | ^4F_(9/2) | ^4S_(3/2) | ^5D_0 | ^5D_4 | ^5I_(15/2) | ^5I_8 | ^6H_(5/2) | ^6H_(15/2) | ^6L_(11/2) | ^6S_(5/2) | ^7F_0 | ^8S_(7/2) | ^9D_2 atomic radius | median | 175 pm | highest | 185 pm (promethium) | lowest | 127 pm (astatine) | distribution | covalent radius | median | 180 pm | highest | 199 pm (promethium) | lowest | 147 pm (technetium) | distribution | (electronic ground state properties)