| General |
|---|
| Name | Chromium | | Symbol | Cr | | Number | 24 | | Chemical series | Transition elements | | Group / Period | 6 / 4 | | Block | d-block | | CAS registry number | 7440-47-3 |
| Physical properties |
|---|
| State | solid | | Density | 7.19 g/cm3 | | Melting point | 2180 K (1907°C, 3465°F) | | Boiling point | 2944 K (2671°C, 4840°F) | | Critical point | |
| Atomic properties |
|---|
| Atomic Weight | 51.9961 g/mol | | Crystal structure | cubic body centered | | Electronegativity | 1.66 | | Atomic radius | 140 pm | | Atomic radius (calculated) | 166 pm | | Electron configuration | [Ar] 3d5 4s1 | | Electrons per shell | 2, 8, 13, 1 | | Number of protons | 24 | | Number of neutrons | 28 |
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Manganese