48Cd112.41
Cadmium
Transition Metal
Solid at STP
Period 5Group 12Block DDiscovered 1817
[Kr]5s2 4d10
Cadmium is a chemical element with symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Like zinc, it prefers oxidation state +2 in most of its compounds and like mercury it shows a low melting point compared to transition metals.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 48 |
| Atomic Mass | 112.41 u |
| Electron Configuration | [Kr]5s2 4d10 |
| Oxidation States | +2 |
| Electronegativity | 1.69 (Pauling) |
| Atomic Radius | 158 pm |
| Ionization Energy | 8.994 eV |
| Block | D |
Physical Properties
| Appearance | silvery bluish-gray metallic |
| Standard State | Solid |
| Melting Point | 594.22 K (321.1 °C) |
| Boiling Point | 1040 K (766.9 °C) |
| Density | 8.69 g/cm³ |
| Molar Heat | 26.02 J/(mol·K) |
| CPK Color | #FFD98F |
Classification
| Category | Transition Metal |
| Group Block | Transition metal |
| Period | 5 |
| Group | 12 |
| Block | D |
Discovery
| Year Discovered | 1817 |
| Discovered By | Karl Samuel Leberecht Hermann |
| Named By | Isotopes of cadmium |
| Electron Shells | 2, 8, 18, 18, 2 |