Yttrium
Transition Metal
Yttrium (Y) is a chemical element with atomic number 39, classified as a transition metal. At room temperature it is a solid. It was discovered in 1794 by Johan Gadolin.
Properties
- Atomic number
- 39
- Atomic mass
- 88.906 u
- Category
- Transition Metal
- Group
- 3
- Period
- 5
- Block
- d-block
- Electron configuration
- [Kr] 4d¹ 5s²
- Phase at STP
- Solid
- Density
- 4.469 g/cm³
- Melting point
- 1799 K (1525.8 °C)
- Boiling point
- 3609 K (3335.8 °C)
- Electronegativity
- 1.22
- Atomic radius
- 212 pm
- Ionization energy
- 6.217 eV
- Discovery
- 1794 · Johan Gadolin
Common uses
LEDs, lasers, superconductors, cancer treatment
Did you know?
Essential for red phosphors in TV screens and LED lights.