Periodic Table Element Comparison: Compare Elements - Thorium vs Technetium
Compare Thorium and Technetium
Compare Thorium and Technetium on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Thorium vs Technetium with most reliable information about their properties, attributes, facts, uses etc. You can compare Th vs Tc on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.
Facts
Name | Thorium | Technetium |
Atomic Number | 90 | 43 |
Atomic Symbol | Th | Tc |
Atomic Weight | 232.0381 | 98 |
Phase at STP | Solid | Solid |
Color | Silver | Silver |
Metallic Classification | Actinide | Transition Metal |
Group in Periodic Table | group - | group 7 |
Group Name | manganese family | |
Period in Periodic Table | period 7 | period 5 |
Block in Periodic Table | f -block | d -block |
Electronic Configuration | [Rn] 6d2 7s2 | [Kr] 4d5 5s2 |
Electronic Shell Structure (Electrons per shell) | 2, 8, 18, 32, 18, 10, 2 | 2, 8, 18, 13, 2 |
Melting Point | 2023 K | 2430 K |
Boiling Point | 5093 K | 4538 K |
CAS Number | CAS7440-29-1 | CAS7440-26-8 |
Neighborhood Elements | Neighborhood Elements of Thorium | Neighborhood Elements of Technetium |
History
Name | Thorium | Technetium |
History | The element Thorium was discovered by J. Berzelius in year 1829 in Sweden. Thorium derived its name from Thor, the Scandinavian god of thunder. | The element Technetium was discovered by C. Perrier and E. Segrè in year 1937 in Italy. Technetium derived its name from the Greek tekhnètos meaning 'artificial'. |
Discovery | J. Berzelius (1829) | C. Perrier and E. Segrè (1937) |
Isolated | D. Lely, Jr. and L. Hamburger (1914) | C. Perrier & E.Segrè (1937) |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
Name | Thorium | Technetium |
Abundance in Universe | 0.4 / 0.002 | - / - |
Abundance in Sun | 0.3 / 0.002 | - / - |
Abundance in Meteorites | 40 / 3 | - / - |
Abundance in Earth's Crust | 6000 / 540 | - / - |
Abundance in Oceans | 0.00004 / 0.0000011 | - / - |
Abundance in Humans | - / - | - / - |
Crystal Structure and Atomic Structure
Name | Thorium | Technetium |
Atomic Volume | 19.7917 cm3/mol | 8.522 cm3/mol |
Atomic Radius | 180 pm | 183 pm |
Covalent Radius | - | 156 pm |
Van der Waals Radius | - | - |
Atomic Spectrum - Spectral Lines | ||
Emission Spectrum | ||
Absorption Spectrum | ||
Lattice Constant | 508.42, 508.42, 508.42 pm | 273.5, 273.5, 438.8 pm |
Lattice Angle | π/2, π/2, π/2 | π/2, π/2, 2 π/3 |
Space Group Name | Fm_ 3m | P63/mmc |
Space Group Number | 225 | 194 |
Crystal Structure | Face Centered Cubic | Simple Hexagonal |
Atomic and Orbital Properties
Name | Thorium | Technetium |
Atomic Number | 90 | 43 |
Number of Electrons (with no charge) | 90 | 43 |
Number of Protons | 90 | 43 |
Mass Number | 232.0381 | 98 |
Number of Neutrons | 142 | 55 |
Shell structure (Electrons per energy level) | 2, 8, 18, 32, 18, 10, 2 | 2, 8, 18, 13, 2 |
Electron Configuration | [Rn] 6d2 7s2 | [Kr] 4d5 5s2 |
Valence Electrons | 6d2 7s2 | 4d5 5s2 |
Oxidation State | 4 | 4, 7 |
Atomic Term Symbol (Quantum Numbers) | 3F2 | 6S5/2 |
Shell structure |
Isotopes and Nuclear Properties
Thorium has 1 stable naturally occuring isotopes while Technetium has 1 stable naturally occuring isotopes.
Name | Thorium | Technetium |
Known Isotopes | 209Th, 210Th, 211Th, 212Th, 213Th, 214Th, 215Th, 216Th, 217Th, 218Th, 219Th, 220Th, 221Th, 222Th, 223Th, 224Th, 225Th, 226Th, 227Th, 228Th, 229Th, 230Th, 231Th, 232Th, 233Th, 234Th, 235Th, 236Th, 237Th, 238Th | 85Tc, 86Tc, 87Tc, 88Tc, 89Tc, 90Tc, 91Tc, 92Tc, 93Tc, 94Tc, 95Tc, 96Tc, 97Tc, 98Tc, 99Tc, 100Tc, 101Tc, 102Tc, 103Tc, 104Tc, 105Tc, 106Tc, 107Tc, 108Tc, 109Tc, 110Tc, 111Tc, 112Tc, 113Tc, 114Tc, 115Tc, 116Tc, 117Tc, 118Tc |
Stable Isotopes | Naturally occurring stable isotopes: 232Th | Naturally occurring stable isotopes: None |
Neutron Cross Section | 7.4 | 22 |
Neutron Mass Absorption | 0.001 | - |
Chemical Properties: Ionization Energies and electron affinity
Name | Thorium | Technetium |
Valence or Valency | 4 | 6 |
Electronegativity | 1.3 Pauling Scale | 1.9 Pauling Scale |
Electron Affinity | - | 53 kJ/mol |
Ionization Energies | 1st: 587 kJ/mol 2nd: 1110 kJ/mol 3rd: 1930 kJ/mol 4th: 2780 kJ/mol | 1st: 702 kJ/mol 2nd: 1470 kJ/mol 3rd: 2850 kJ/mol |
Physical Properties
Name | Thorium | Technetium |
Density | 11.724 g/cm3 | 11.5 g/cm3 |
Molar Volume | 19.7917 cm3/mol | 8.522 cm3/mol |
Elastic Properties | ||
Young Modulus | 79 | - |
Shear Modulus | 31 GPa | - |
Bulk Modulus | 54 GPa | - |
Poisson Ratio | 0.27 | - |
Hardness - Tests to Measure of Hardness of Element | ||
Mohs Hardness | 3 MPa | - |
Vickers Hardness | 350 MPa | - |
Brinell Hardness | 400 MPa | - |
Electrical Properties | ||
Electrical Conductivity | 6700000 S/m | 5000000 S/m |
Resistivity | 1.5e-7 m Ω | 2e-7 m Ω |
Superconducting Point | 1.38 | 7.8 |
Heat and Conduction Properties | ||
Thermal Conductivity | 54 W/(m K) | 51 W/(m K) |
Thermal Expansion | 0.000011 /K | - |
Magnetic Properties | ||
Magnetic Type | Paramagnetic | Paramagnetic |
Curie Point | - | - |
Mass Magnetic Susceptibility | 7.2e-9 m3/kg | 3.42e-8 m3/kg |
Molar Magnetic Susceptibility | 1.7e-9 m3/mol | 3.352e-9 m3/mol |
Volume Magnetic Susceptibility | 0.000084 | 0.0003933 |
Optical Properties | ||
Refractive Index | - | - |
Acoustic Properties | ||
Speed of Sound | 2490 m/s | - |
Thermal Properties - Enthalpies and thermodynamics
Name | Thorium | Technetium |
Melting Point | 2023 K | 2430 K |
Boiling Point | 5093 K | 4538 K |
Critical Temperature | - | - |
Superconducting Point | 1.38 | 7.8 |
Enthalpies | ||
Heat of Fusion | 16 kJ/mol | 23 kJ/mol |
Heat of Vaporization | 530 kJ/mol | 550 kJ/mol |
Heat of Combustion | - | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
Name | Thorium | Technetium |
CAS Number | CAS7440-29-1 | CAS7440-26-8 |
RTECS Number | RTECSXO6400000 | - |
DOT Hazard Class | 7 | - |
DOT Numbers | 2975 | - |
EU Number | EU231-139-7 | - |
NFPA Fire Rating | - | - |
NFPA Health Rating | - | - |
NFPA Reactivity Rating | - | - |
NFPA Hazards | - | - |
AutoIgnition Point | 130 °C | - |
Flashpoint | - | - |