78Pt195.08
Platinum
Transition metal · element 78 · group 10, period 6
Quick facts
| Symbol | Pt |
|---|---|
| Atomic number | 78 |
| Relative atomic mass | 195.08 |
| Category | Transition metal |
| Position | group 10, period 6 |
| State at 20 °C | Solid |
| Melting point | 1,768.3 °C |
| Boiling point | 3,825 °C |
| Density | 21.45 g/cm³ |
| Electronegativity | 2.28 |
| Electron configuration | [Xe] 4f14 5d9 6s1 |
About Platinum
Platinum has the symbol Pt and atomic number 78, which means every platinum atom has 78 protons in its nucleus and, in a neutral atom, 78 electrons. At room temperature it is a solid.
Transition metals sit in the middle block of the periodic table. They are usually hard, dense and strong, often form coloured compounds, can have more than one ion charge, and many are useful catalysts.
It melts at 1,768.3 °C and boils at 3,825 °C.
Explore it
See where platinum sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.