Chroom |
Simbool | Cr |
---|---|
Latynse naam | Chromium |
Atoomgetal | 24 |
Periode | 4 |
Element kategorie | Oorgangselemente |
Relatieve atomiese massa | 51.9961 |
Groep | VI.B |
Electronegativiteit | 1.6 |
Oksidering nommers | 2, 3, 4, 5, 6 |
Elektronkonfigurasie | 1s2 2s2 2p6 3s2 3p6 3d5 4s1 |
Digtheid [g/cm3] | 7.19 |
Staat | Vaste stof |
Smeltpunt [°C] | 1857 |
Kookpunt [°C] | 2672 |
Atoomradius [pm] | 166 |
Covalent radius [pm] | 127 |
Termiese geleidingsvermoë [W m-1K-1] | 93.7 |
Hitte kapasiteit [J K-1g-1] | 0.449 |
Ontdekking | 1797 |
Hardheid [Mohs-skaal] | 9.0 |
Vickers se hardheid [MPa] | 1060 |
Brinell-hardheid [MPa] | 1120 |
Young's modulus [GPa] | 279 |
Elektriese geleiding [S m-1] | 7.9 · 106 |
Shear modulus [GPa] | 115 |
1ste ionisasie-energie [eV] | 6.7666 |
2de ionisasie-energie [eV] | 16.5 |
3de ionisasie-energie [eV] | 30.96 |
Stabiele isotope | 4 |
Onstabiele isotope | 5 |