46Pd106.421
Transition Metald-block
Palladium
Element 46 on the periodic table, symbol Pd, group 10, period 5.
Palladium is a chemical element with symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by William Hyde Wollaston. He named it after the asteroid Pallas, which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas.
Appearance: silvery white
Properties
- Atomic Number
- 46
- Atomic Mass
- 106.4210 u
- Group
- 10
- Period
- 5
- Block
- d-block
- Category
- Transition Metal
- State at 25 °C
- Solid
- Melting Point
- 1,828.1 K · 1,554.9 °C
- Boiling Point
- 3,236 K · 2,962.9 °C
- Density
- 12.023 g/cm³
- Atomic Radius
- 140 pm
- Electronegativity
- 2.2
- Oxidation States
- +2, +4
- Abundance in Crust
- 0.015 mg/kg
- Discovered
- 1803
- Discovered By
- William Hyde Wollaston
Electron Configuration
[Kr] 4d10
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d10
Ionisation Energies (kJ/mol)
- 1. 804.4
- 2. 1,870
- 3. 3,177
Elements near Palladium
Elements in the same group share the number of outer electrons and behave in similar ways. Elements in the same period share a shell, so they change steadily from left to right.