actinium vs cerium vs terbium vs ytterbium

actinium (chemical element) | cerium (chemical element) | terbium (chemical element) | ytterbium (chemical element)

Periodic table location

Images

| atomic symbol | atomic number | short electronic configuration actinium | Ac | 89 | [Rn]7s^26d^1 cerium | Ce | 58 | [Xe]6s^24f^15d^1 terbium | Tb | 65 | [Xe]6s^24f^9 ytterbium | Yb | 70 | [Xe]6s^24f^14 | Aufbau diagram | block actinium | 6d 7s | f cerium | 5d 4f 6s | f terbium | 4f 6s | f ytterbium | 4f 6s | f | period | atomic mass | half-life actinium | 7 | 227 u | 21.787 yr cerium | 6 | 140.116 u | (stable) terbium | 6 | 158.92535 u | (stable) ytterbium | 6 | 173.045 u | (stable)

phase at STP | all | solid melting point | median | 934 °C | highest | 1356 °C (terbium) | lowest | 798 °C (cerium) | distribution | boiling point | median | 3215 °C | highest | 3360 °C (cerium) | lowest | 1196 °C (ytterbium) molar heat of fusion | median | 9.3 kJ/mol | highest | 14 kJ/mol (actinium) | lowest | 5.5 kJ/mol (cerium) | distribution | molar heat of vaporization | median | 322 kJ/mol | highest | 400 kJ/mol (actinium) | lowest | 160 kJ/mol (ytterbium) | distribution | specific heat at STP | median | 168 J/(kg K) | highest | 192 J/(kg K) (cerium) | lowest | 120 J/(kg K) (actinium) | distribution | (properties at standard conditions)

density | median | 7.454 g/cm^3 | highest | 10.07 g/cm^3 (actinium) | lowest | 6.57 g/cm^3 (ytterbium) | distribution | liquid density | median | 6.55 g/cm^3 | highest | 7.65 g/cm^3 (terbium) | lowest | 6.21 g/cm^3 (ytterbium) | distribution | molar volume | median | 21.7 cm^3/mol | highest | 26.34 cm^3/mol (ytterbium) | lowest | 19.34 cm^3/mol (terbium) | distribution | Vickers hardness | all | 206 MPa | 270 MPa | 863 MPa Brinell hardness | all | 343 MPa | 412 MPa | 677 MPa bulk modulus | median | 31 GPa | highest | 38.7 GPa (terbium) | lowest | 22 GPa (cerium) | distribution | shear modulus | median | 14 GPa | highest | 22 GPa (terbium) | lowest | 9.9 GPa (ytterbium) | distribution | Young's modulus | median | 34 GPa | highest | 56 GPa (terbium) | lowest | 24 GPa (ytterbium) | distribution | Poisson ratio | all | 0.21 | 0.24 | 0.26 tensile yield strength | median | 66 MPa | highest | 91 MPa (cerium) | lowest | 60 MPa (terbium) ultimate tensile strength | all | 72 MPa | 100 MPa | 140 MPa sound speed | median | 2100 m/s | highest | 2620 m/s (terbium) | lowest | 1590 m/s (ytterbium) | distribution | thermal expansion | median | 1.03×10^-5 K^(-1) | highest | 2.63×10^-5 K^(-1) (ytterbium) | lowest | 6.3×10^-6 K^(-1) (cerium) | distribution | thermal conductivity | median | 12 W/(m K) | highest | 39 W/(m K) (ytterbium) | lowest | 11 W/(m K) (cerium and terbium) (properties at standard conditions)

resistivity | median | 7.4×10^-7 Ω m (ohm meters) | highest | 1.2×10^-6 Ω m (ohm meters) (terbium) | lowest | 2.8×10^-7 Ω m (ohm meters) (ytterbium) | distribution | electrical conductivity | median | 1.4×10^6 S/m (siemens per meter) | highest | 3.6×10^6 S/m (siemens per meter) (ytterbium) | lowest | 830000 S/m (siemens per meter) (terbium) | distribution | volume magnetic susceptibility | median | 0.0014716 | highest | 0.1117784 (terbium) | lowest | 3.88×10^-5 (ytterbium) mass magnetic susceptibility | median | 2.2×10^-7 m^3/kg (cubic meters per kilogram) | highest | 1.36×10^-5 m^3/kg (cubic meters per kilogram) (terbium) | lowest | 5.9×10^-9 m^3/kg (cubic meters per kilogram) (ytterbium) molar magnetic susceptibility | median | 3.0826×10^-8 m^3/mol (cubic meters per mole) | highest | 2.161385×10^-6 m^3/mol (cubic meters per mole) (terbium) | lowest | 1.02×10^-9 m^3/mol (cubic meters per mole) (ytterbium) work function | all | 2.9 eV | 3 eV

valence | median | 3 | highest | 4 (cerium) | lowest | 3 (3 elements) electron affinity | median | 50 kJ/mol (kilojoules per mole) | highest | 50 kJ/mol (kilojoules per mole) (3 elements) | lowest | 50 kJ/mol (kilojoules per mole) (3 elements) first ionization energy | median | 550.1 kJ/mol (kilojoules per mole) | highest | 603.4 kJ/mol (kilojoules per mole) (ytterbium) | lowest | 499 kJ/mol (kilojoules per mole) (actinium) | distribution |

term symbol | all | ^1G_4 | ^1S_0 | ^2D_(3/2) | ^6H_(15/2) atomic radius | median | 180 pm | highest | 195 pm (actinium) | lowest | 175 pm (terbium and ytterbium) | distribution | covalent radius | median | 199 pm | highest | 215 pm (actinium) | lowest | 187 pm (ytterbium) | distribution | (electronic ground state properties)

universe abundance | median | 2×10^-7 mass% | highest | 1×10^-6 mass% (cerium) | lowest | 5×10^-8 mass% (terbium) solar abundance | median | 5.5×10^-8 mass% | highest | 4×10^-7 mass% (cerium) | lowest | 0 mass% (actinium) | distribution | meteorite abundance | median | 1.8×10^-5 mass% | highest | 7.5×10^-5 mass% (cerium) | lowest | 3.9×10^-6 mass% (terbium) crust abundance | median | 2.8×10^-4 mass% | highest | 0.006 mass% (cerium) | lowest | 9.3×10^-5 mass% (terbium) ocean abundance | median | 8×10^-11 mass% | highest | 1.2×10^-10 mass% (cerium) | lowest | 1.4×10^-11 mass% (terbium) | distribution | universe molar abundance | median | 1×10^-9 mol% | highest | 9×10^-9 mol% (cerium) | lowest | 4×10^-10 mol% (terbium) solar molar abundance | median | 5.4×10^-10 mol% | highest | 3×10^-9 mol% (cerium) | lowest | 0 mol% (actinium) meteorite molar abundance | median | 2×10^-6 mol% | highest | 1.1×10^-5 mol% (cerium) | lowest | 5×10^-7 mol% (terbium) ocean molar abundance | median | 5.3×10^-12 mol% | highest | 5×10^-6 mol% (terbium) | lowest | 2.9×10^-12 mol% (ytterbium) crust molar abundance | median | 3.4×10^-5 mol% | highest | 8.9×10^-4 mol% (cerium) | lowest | 1.2×10^-5 mol% (terbium)