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.
Experiment with the elements
Yttrium doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.