| Element (Atom) Name | Thorium |
| Symbol | Th |
| Physical state at room temperature | Solid |
| Element Classification | Metal |
| Group Name | Actinide |
| Period Number (Periodic table) | 7 |
| Group number (Periodic table) | None |
| Atomic number | 90 |
| Atomic weight | 232.0377 (Ref: Jlab-ele090, ciaaw-thorium, Nist-90) 232 (Ref: Lanl-90) |
| Atomic Radius | 237 pm (Van der Waals) (Ref: Lanl-90) |
| Density | 11.72 g/cm3 (Ref: Jlab-ele090) |
| Melting point | 1750°C (Ref: Jlab-ele090, Lanl-90) |
| Boiling point | 4788°C (Ref: Jlab-ele090, Lanl-90) |
| Electron shell configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 6d2 7s2 |
| Oxidation States | +4 (Ref: Jlab-ele090) 4, 3, 2 , 1 (Ref: Lanl-90) |
| Ionization Energy | 6.08 eV (Ref: Jlab-ele090) 6.30670 eV (Ref: Nist-90) |
| Number of Stable Isotopes | 0 |
| InChI | InChI=1S/Th (Ref: Pubchem-90) |
| InChI Key | ZSLUVFAKFWKJRC-UHFFFAOYSA-N (Ref: Pubchem-90) |
| Remarks | Radioactive |
REFERENCES
- Jlab-ele090: https://education.jlab.org/itselemental/ele090.html
- Lanl-90: https://periodic.lanl.gov/90.shtml
- ciaaw-thorium: https://www.ciaaw.org/thorium.htm
- Nist-90: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=90
- Pubchem-90: https://pubchem.ncbi.nlm.nih.gov/element/90
- science.co.il: https://www.science.co.il/elements/
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