Element 46
Palladium (Pd)
Palladium (Pd) is element 46 of the periodic table, a transition metal in period 5, group 10 (d-block) with an atomic mass of 106.42 and is a solid at standard conditions.
At a glance
- Atomic number
- 46
- Symbol
- Pd
- Atomic mass
- 106.42 u
- Category
- Transition metals
- Period
- 5
- Group
- 10
- Block
- d-block
- Phase at STP
- solid
Electron structure
- Electron configuration
- 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10
- Shorthand configuration
- [Kr] 4d10
- Electrons per shell
- 2, 8, 18, 18
- Oxidation states
- 0, +1, +2, +3, +4
Physical properties
- Melting point
- 1,828.05 K (1,554.9 °C)
- Boiling point
- 3,236 K (2,962.85 °C)
- Density
- 12.02 g/cm³
- Phase
- solid
Atomic properties
- Electronegativity (Pauling)
- 2.2
- Atomic radius
- 169 pm
- Covalent radius
- 139 pm
- Van der Waals radius
- 163 pm
- First ionization energy
- 804 kJ/mol
- Electron affinity
- 54 kJ/mol
Notable isotopes
| Isotope | Mass | Abundance | Stability |
|---|---|---|---|
| Pd-106 | 105.90348 | 27.33% | Stable |
Common uses
- Catalytic converters
- Electronics
- Dentistry
- Jewelry
Discovery
- Year
- 1803
- Discovered by
- William Hyde Wollaston
- Country
- England
Frequently asked questions
- Is palladium a metal?
- Yes. Palladium is a metal, classified as a transition metal on the periodic table.
- How many protons does palladium have?
- Palladium has 46 protons. Its atomic number is 46, which is also the number of electrons in a neutral atom of palladium.
- What group and period is palladium in?
- Palladium is in group 10 and period 5 of the periodic table, in the d-block.
- What is the atomic mass of palladium?
- The atomic mass of palladium is 106.42 u (unified atomic mass units).
Keep exploring
Palladium's row is on the printable element property sheet, and its tile is on the periodic table wall chart - the same numbers as above, laid out for A4 or A3 paper.