| Element (Atom) Name | Hafnium |
| Symbol | Hf |
| Physical state at room temperature | Solid |
| Element Classification | Metal |
| Group Name | None |
| Period Number (Periodic table) | 6 |
| Group number (Periodic table) | 4 |
| Atomic number | 72 |
| Atomic weight | 178.49 (Ref: Jlab-ele072, Nist-72) 178.5 (Ref: Lanl-72) 178.486 ± 0.006 (Ref: ciaaw-hafnium) |
| Atomic Radius | 212 pm (Van der Waals) (Ref: Lanl-72) |
| Density | 13.3 g/cm3 (Ref: Jlab-ele072) |
| Melting point | 2233°C (Ref: Jlab-ele072, Lanl-72) |
| Boiling point | 4603°C (Ref: Jlab-ele072, Lanl-72) |
| Electron shell configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d2 6s2 |
| Oxidation States | +4 (Ref: Jlab-ele072) 4, 3, 2, 1, −2 (an amphoteric oxide) (Ref: Lanl-72) |
| Ionization Energy | 6.825 eV (Ref: Jlab-ele072) 6.825070 eV (Ref: Nist-72) |
| Number of Stable Isotopes | 5 |
| InChI | InChI=1S/Hf (Ref: Pubchem-72) |
| InChI Key | VBJZVLUMGGDVMO-UHFFFAOYSA-N (Ref: Pubchem-72) |
| Remarks |
REFERENCES
- Jlab-ele072: https://education.jlab.org/itselemental/ele072.html
- Lanl-72: https://periodic.lanl.gov/72.shtml
- ciaaw-hafnium : https://www.ciaaw.org/hafnium.htm
- Nist-72: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=72
- Pubchem-72: https://pubchem.ncbi.nlm.nih.gov/element/72
- science.co.il: https://www.science.co.il/elements/
