| Element (Atom) Name | Thallium |
| Symbol | Tl |
| Physical state at room temperature | Solid |
| Element Classification | Metal |
| Group Name | None |
| Period Number (Periodic table) | 6 |
| Group number (Periodic table) | 13 |
| Atomic number | 81 |
| Atomic weight | 204.3833 (Ref: Jlab-ele081) 204.38 (Ref: Lanl-81) [204.382, 204.385] (Ref: ciaaw-thallium, Nist-81) |
| Atomic Radius | 196 pm (Van der Waals) (Ref: Lanl-81) |
| Density | 11.8 g/cm3 (Ref: Jlab-ele081) |
| Melting point | 304°C (Ref: Jlab-ele081, Lanl-81) |
| Boiling point | 1473°C (Ref: Jlab-ele081, Lanl-81) |
| Electron shell configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p1 |
| Oxidation States | +3, +1 (Ref: Jlab-ele081) 3, 2, 1, −1, −2, −5 (Ref: Lanl-81) |
| Ionization Energy | 6.108 eV (Ref: Jlab-ele081) 6.1082873 eV (Ref: Nist-81) |
| Number of Stable Isotopes | 2 |
| InChI | InChI=1S/Tl (Ref: Pubchem-81) |
| InChI Key | BKVIYDNLLOSFOA-UHFFFAOYSA-N (Ref: Pubchem-81) |
| Remarks |
REFERENCES
- Jlab-ele081: https://education.jlab.org/itselemental/ele081.html
- Lanl-81: https://periodic.lanl.gov/81.shtml
- ciaaw-thallium: https://www.ciaaw.org/thallium.htm
- Nist-81: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=81
- Pubchem-81: https://pubchem.ncbi.nlm.nih.gov/element/81
- science.co.il: https://www.science.co.il/elements/
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