Platinum (Pt)
Platinum (Pt, element 78) is a transition metal in group 10, period 6. Atomic mass 195.084, electron configuration [Xe] 4f¹⁴ 5d⁹ 6s¹, uses and facts.
About Platinum
Platinum is a transition metal with the symbol Pt and atomic number 78. It is a solid at room temperature, and it sits in group 10, period 6 of the periodic table. Platinum was discovered in 1735 by Antonio de Ulloa.
Platinum key facts
- Atomic number: 78
- Symbol: Pt
- Atomic mass: 195.084 u
- Category: transition metal
- Group: 10
- Period: 6
- State at room temperature: solid
- Electron configuration: [Xe] 4f¹⁴ 5d⁹ 6s¹
- Electronegativity (Pauling): 2.28
- Melting point: 2041.4 K (1768.25 °C)
- Boiling point: 4098 K (3824.85 °C)
- Density: 21.45 g/cm³
- Common oxidation states: −3, −2, −1, 0, +1, +2, +3, +4, +5, +6
Electron configuration
The electron configuration of platinum is [Xe] 4f¹⁴ 5d⁹ 6s¹. The part in brackets is the noble gas core; the rest shows how the outer electrons fill their subshells.
Uses of platinum
- Catalytic converters
- Jewelry
- Cancer drugs
Did you know?
The international kilogram prototype, the official definition of 1 kg for 130 years, was a platinum-iridium cylinder.
Other elements in group 10 and neighbours
Frequently asked questions
What is the atomic number of platinum?
The atomic number of platinum is 78, which means every platinum atom has 78 protons.
What is the electron configuration of platinum?
The electron configuration of platinum is [Xe] 4f¹⁴ 5d⁹ 6s¹.
What group and period is platinum in?
Platinum is a transition metal in group 10, period 6.
What state is platinum at room temperature?
Platinum is a solid at room temperature.
What is platinum used for?
Platinum is used for catalytic converters, jewelry, cancer drugs.