Periodic Table Element Comparison: Compare Elements - Lanthanum vs Thallium
Compare Lanthanum and Thallium 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 Lanthanum vs Thallium with most reliable information about their properties, attributes, facts, uses etc. You can compare La vs Tl on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. Lanthanum and Thallium comparison table on more than 90 properties.
Lanthanum and Thallium Comparison
Facts
| Name | Lanthanum | Thallium |
|---|---|---|
| Atomic Number | 57 | 81 |
| Atomic Symbol | La | Tl |
| Atomic Weight | 138.9055 undefined | 204.3833 undefined |
| Phase at STP | Solid undefined | Solid undefined |
| Color | Silver undefined | Silver undefined |
| Metallic Classification | Lanthanide undefined | Post Transition Metal undefined |
| Group in Periodic Table | group - | group 13 undefined |
| Group Name | boron family | |
| Period in Periodic Table | period 6 undefined | period 6 undefined |
| Block in Periodic Table | f undefined-block | p undefined-block |
| Electronic Configuration | [Xe] 5d1 6s2 undefined | [Xe] 4f14 5d10 6s2 6p1 undefined |
| Electronic Shell Structure (Electrons per shell) | 2, 8, 18, 18, 9, 2 | 2, 8, 18, 32, 18, 3 |
| Melting Point | 1193 undefined | 577 undefined |
| Boiling Point | 3737 undefined | 1746 undefined |
| CAS Number | CAS7439-91-0 undefined | CAS7440-28-0 undefined |
| Neighborhood Elements | Neighborhood Elements of Lanthanum | Neighborhood Elements of Thallium |
History
| Parameter | Lanthanum | Thallium |
|---|---|---|
| History | The element Lanthanum was discovered by G. Mosander in year 1838 in Sweden. Lanthanum derived its name from the Greek lanthanein, meaning 'to lie hidden'. | The element Thallium was discovered by W. Crookes in year 1861 in United Kingdom. Thallium derived its name from the Greek thallos, 'green twig'. |
| Discovery | G. Mosander (1838) | W. Crookes (1861) |
| Isolated | G. Mosander (1841) | C.-A. Lamy (1862) |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
| Property | Lanthanum | Thallium |
|---|---|---|
| Abundance in Universe | 2 / 0.02 | 0.5 / 0.003 |
| Abundance in Sun | 2 / 0.01 | 1 / 0.01 |
| Abundance in Meteorites | 290 / 40 | 80 / 6 |
| Abundance in Earth's Crust | 34000 / 5000 | 530 / 50 |
| Abundance in Oceans | 0.0034 / 0.00015 | 0.001 / 0.000030 |
| Abundance in Humans | - / - | - / - |
Crystal Structure and Atomic Structure
| Property | Lanthanum | Thallium |
|---|---|---|
| Atomic Volume | 22.386 undefined | 17.24 undefined |
| Atomic Radius | 195 undefined | 156 undefined |
| Covalent Radius | 169 undefined | 148 undefined |
| Van der Waals Radius | - | 196 undefined |
Atomic Spectrum - Spectral Lines | ||
| Emission Spectrum |  |  |
| Absorption Spectrum |  |  |
| Lattice Constant | 377.2, 377.2, 1214.4 | 345.66, 345.66, 552.48 |
| Lattice Angle | π/2, π/2, 2 π/3 | π/2, π/2, 2 π/3 |
| Space Group Name | P63/mmc undefined | P63/mmc undefined |
| Space Group Number | 194 undefined | 194 undefined |
| Crystal Structure | Simple Hexagonal undefined  | Simple Hexagonal undefined |
Atomic and Orbital Properties
| Property | Lanthanum | Thallium |
|---|---|---|
| Atomic Number | 57 | 81 |
| Number of Electrons (with no charge) | 57 | 81 |
| Number of Protons | 57 | 81 |
| Mass Number | 138.9055 | 204.3833 |
| Number of Neutrons | 82 | 123 |
| Shell structure (Electrons per energy level) | 2, 8, 18, 18, 9, 2 | 2, 8, 18, 32, 18, 3 |
| Electron Configuration | [Xe] 5d1 6s2 undefined | [Xe] 4f14 5d10 6s2 6p1 undefined |
| Valence Electrons | 5d1 6s2 undefined | 6s2 6p1 undefined |
| Oxidation State | 3 | 1, 3 |
| Atomic Term Symbol (Quantum Numbers) | 2D3/2 undefined | 2P1/2 undefined |
| Shell structure |  |  |
Isotopes and Nuclear Properties
Lanthanum has 1 stable naturally occuring isotopes while Thallium has 2 stable naturally occuring isotopes.
| Parameter | Lanthanum | Thallium |
|---|---|---|
| Known Isotopes | 117La, 118La, 119La, 120La, 121La, 122La, 123La, 124La, 125La, 126La, 127La, 128La, 129La, 130La, 131La, 132La, 133La, 134La, 135La, 136La, 137La, 138La, 139La, 140La, 141La, 142La, 143La, 144La, 145La, 146La, 147La, 148La, 149La, 150La, 151La, 152La, 153La, 154La, 155La | 176Tl, 177Tl, 178Tl, 179Tl, 180Tl, 181Tl, 182Tl, 183Tl, 184Tl, 185Tl, 186Tl, 187Tl, 188Tl, 189Tl, 190Tl, 191Tl, 192Tl, 193Tl, 194Tl, 195Tl, 196Tl, 197Tl, 198Tl, 199Tl, 200Tl, 201Tl, 202Tl, 203Tl, 204Tl, 205Tl, 206Tl, 207Tl, 208Tl, 209Tl, 210Tl, 211Tl, 212Tl |
| Stable Isotopes | Naturally occurring stable isotopes: 139La | Naturally occurring stable isotopes: 203Tl, 205Tl |
| Neutron Cross Section | 8.98 undefined | 3.4 undefined |
| Neutron Mass Absorption | 0.0023 undefined | 0.0006 undefined |
Chemical Properties: Ionization Energies and electron affinity
| Property | Lanthanum | Thallium |
|---|---|---|
| Valence or Valency | 3 undefined | 3 undefined |
| Electronegativity | 1.1 undefined | 1.62 undefined |
| Electron Affinity | 48 undefined | 19.2 undefined |
| Ionization Energies | 1st: 538.1 undefined 2nd: 1067 undefined 3rd: 1850.3 undefined 4th: 4819 undefined 5th: 5940 undefined | 1st: 589.4 undefined 2nd: 1971 undefined 3rd: 2878 undefined |
Physical Properties
| Property | Lanthanum | Thallium |
|---|---|---|
| Density | 6.146 undefined | 11.85 undefined |
| Molar Volume | 22.386 undefined | 17.24 undefined |
Elastic Properties | ||
| Young Modulus | 37 undefined | 8 undefined |
| Shear Modulus | 14 undefined | 2.8 undefined |
| Bulk Modulus | 28 undefined | 43 undefined |
| Poisson Ratio | 0.28 undefined | 0.45 undefined |
Hardness - Tests to Measure of Hardness of Element | ||
| Mohs Hardness | 2.5 undefined | 1.2 undefined |
| Vickers Hardness | 491 undefined | - |
| Brinell Hardness | 363 undefined | 26.4 undefined |
Electrical Properties | ||
| Electrical Conductivity | 1600000 undefined | 6700000 undefined |
| Resistivity | 6.1e-7 undefined | 1.5e-7 undefined |
| Superconducting Point | 4.88 undefined | 2.38 undefined |
Heat and Conduction Properties | ||
| Thermal Conductivity | 13 undefined | 46 undefined |
| Thermal Expansion | 0.0000121 undefined | 0.0000299 undefined |
Magnetic Properties | ||
| Magnetic Type | Paramagnetic undefined | Diamagnetic undefined |
| Curie Point | - | - |
| Mass Magnetic Susceptibility | 1.1e-8 undefined | -3e-9 undefined |
| Molar Magnetic Susceptibility | 1.528e-9 undefined | -6.13e-10 undefined |
| Volume Magnetic Susceptibility | 0.00006761 undefined | -0.0000356 undefined |
Optical Properties | ||
| Refractive Index | - | - |
Acoustic Properties | ||
| Speed of Sound | 2475 undefined | 818 undefined |
Thermal Properties - Enthalpies and thermodynamics
| Property | Lanthanum | Thallium |
|---|---|---|
| Melting Point | 1193 undefined | 577 undefined |
| Boiling Point | 3737 undefined | 1746 undefined |
| Critical Temperature | - | - |
| Superconducting Point | 4.88 undefined | 2.38 undefined |
Enthalpies | ||
| Heat of Fusion | 6.2 undefined | 4.2 undefined |
| Heat of Vaporization | 400 undefined | 165 undefined |
| Heat of Combustion | - | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
| Parameter | Lanthanum | Thallium |
|---|---|---|
| CAS Number | CAS7439-91-0 undefined | CAS7440-28-0 undefined |
| RTECS Number | - | RTECSXG3425000 undefined |
| DOT Hazard Class | 4.1 undefined | - |
| DOT Numbers | 3178 undefined | 1707 undefined |
| EU Number | - | - |
| NFPA Fire Rating | - | - |
| NFPA Health Rating | - | - |
| NFPA Reactivity Rating | - | - |
| NFPA Hazards | - | - |
| AutoIgnition Point | - | - |
| Flashpoint | - | - |
Compare With Other Elements
Compare Lanthanum and Thallium with other elements of the periodic table.