| Element (atom) Name | Potassium |
| Symbol | K |
| Physical state at room temperature | Solid |
| Element Classification | Metal |
| Group Name | Alkali Metal |
| Group number (Periodic table) | 1 |
| Period Number (Periodic table) | 4 |
| Atomic number | 19 |
| Atomic Weight | 39.0983 (Ref: Jlab-ele019, Ciaaw-potassium, Nist-element 19) 39.10 (Ref: Lanl-19) |
| Atomic Radius | 275 pm (Van der Waals) (Ref: Lanl-19) |
| Density | 0.89 g/cm3 (Ref: Jlab-ele019) |
| Melting point | 63.38°C (Ref: Jlab-ele019) 65.5 °C (Ref: Lanl-19) |
| Boiling point | 759°C (Ref: Jlab-ele019, Lanl-19) |
| Electron Shell Configuration | 1s2 2s2 2p6 3s2 3p6 4s1 |
| Oxidation States | +1 (Ref: Jlab-ele019) +1, −1 (a strongly basic oxide) (Ref: Lanl-19) |
| Ionization Energy | 4.341 eV (Ref: Jlab-ele019) 4.34066373 eV (Nist-element 19) |
| Number of Stable Isotopes | 2 |
| InChI | 1S/K (Ref: Pubchem-Potassium) |
| InChI Key | ZLMJMSJWJFRBEC-UHFFFAOYSA-N (Ref: Pubchem-Potassium) |
REFERENCES
- Jlab-ele019: https://education.jlab.org/itselemental/ele019.html
- Lanl-19: https://periodic.lanl.gov/19.shtml
- Ciaaw-potassium : https://www.ciaaw.org/potassium.htm
- Nist-element 19: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=19
- Pubchem-Potassium : https://pubchem.ncbi.nlm.nih.gov/element/Potassium
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