Yttrium (Y) - Element 39 | Properties & Electron Configuration
What is Yttrium?
Yttrium (Y) is element 39, a transition metal in period 5, group 3. Its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹ 5s².
| Atomic Number | 39 |
| Symbol | Y |
| Atomic Mass | 88.906 u |
| Category | Transition Metal |
| Period | 5 |
| Group | 3 |
| Block | d |
| Electron Configuration | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹ 5s² |
| Short Config | [Kr] 4d¹ 5s² |
| Electronegativity | 1.22 |
| Atomic Radius | 180 pm |
| Ionization Energy | 600 kJ/mol |
| Electron Affinity | 30 kJ/mol |
| Phase (STP) | Solid |
Electron Configuration
The full electron configuration of Yttrium is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹ 5s². In noble gas shorthand, this is written as [Kr] 4d¹ 5s².
Yttrium is a d-block element in group 3, period 5.
Periodic Trends
Electronegativity: Yttrium has a Pauling electronegativity of 1.22. Within group 3, electronegativity generally decreases down the group.
Atomic Radius: 180 pm. Across period 5, atomic radius generally decreases left to right as nuclear charge increases.
Ionization Energy: 600 kJ/mol. Ionization energy generally increases across a period and decreases down a group.
View all 118 elements with trend overlays for electronegativity, atomic radius, ionization energy, and electron affinity.
Explore Yttrium on the Interactive Periodic Table