Kalium |
| Simbool | K |
|---|---|
| Latynse naam | Kalium |
| Atoomgetal | 19 |
| Periode | 4 |
| Element kategorie | Alkalie metale |
| Relatieve atomiese massa | 39.0983 |
| Groep | I.A |
| Electronegativiteit | 0.9 |
| Oksidering nommers | 1 |
| Elektronkonfigurasie | 1s2 2s2 2p6 3s2 3p6 4s1 |
| Digtheid [g/cm3] | 0.862 |
| Staat | Vaste stof |
| Smeltpunt [°C] | 93.65 |
| Kookpunt [°C] | 760 |
| Kritiese Punt [°C] | 1950 |
| Kritiese druk [MPa] | 16 |
| Atoomradius [pm] | 243 |
| Covalent radius [pm] | 196 |
| Termiese geleidingsvermoë [W m-1K-1] | 102.5 |
| Hitte kapasiteit [J K-1g-1] | 0.757 |
| Ontdekking | 1807 |
| Hardheid [Mohs-skaal] | 0.5 |
| Brinell-hardheid [MPa] | 0.363 |
| Elektriese geleiding [S m-1] | 1.64 · 107 |
| 1ste ionisasie-energie [eV] | 4.3407 |
| 2de ionisasie-energie [eV] | 31.625 |
| 3de ionisasie-energie [eV] | 45.72 |
| Stabiele isotope | 3 |
| Onstabiele isotope | 8 |