78
Pt
195.08
Platinum (Pt)
Element 78 · Period 6 · Group 10
transition-metal
solid at room temp
d-block
About Platinum
Precious metal used in catalytic converters, jewelry, and chemotherapy drugs (cisplatin).
Physical Properties
Atomic Mass
195.08 u
State at 25°C
Solid
Melting Point
1768.3 °C
Boiling Point
3825 °C
Density
21.45 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Xe] 4f¹⁴ 5d⁹ 6s¹
Electron Shells
2, 8, 18, 32, 17, 1
Electronegativity
2.28
Atomic Radius
177 pm
Ionization Energy
870 kJ/mol
Oxidation States
+2, +4
Discovery & History
Discovered By
Antonio de Ulloa
Discovery Year
1748
Named By
Antonio de Ulloa
Name origin: Spanish: platina (little silver)
Frequently Asked Questions
- Is Platinum a metal, nonmetal, or metalloid?
- Platinum is classified as a transition-metal.
- What state is Platinum in at room temperature?
- Platinum is a solid at standard room temperature (25°C).
- What is the atomic mass of Platinum?
- Platinum has an atomic mass of 195.08 atomic mass units (u).
- Who discovered Platinum?
- Platinum was discovered by Antonio de Ulloa in 1748.
- Where is Platinum on the periodic table?
- Platinum is element number 78, located in period 6 and group 10.