63151.96EuEuropium
Europium (Eu) — element 63lanthanide · period 6
Europium is a chemical element with the symbol Eu and atomic number 63. It is a lanthanide in period 6 of the periodic table (the f-block), with a standard atomic mass of 151.96 u. At room temperature (25 °C) europium is a solid.
💡 Known for: Provides red and blue phosphors in screens and glows in the anti-counterfeiting marks on euro banknotes.
# Europium properties
| Symbol | Eu |
|---|---|
| Atomic number | 63 |
| Atomic mass | 151.96 u |
| Category | lanthanide |
| Group | — (f-block, no group number) |
| Period | 6 |
| Block | f-block |
| Electron configuration | [Xe] 4f⁷ 6s² |
| Full configuration | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f⁷ 5s² 5p⁶ 6s² |
| Electrons per shell | 2, 8, 18, 25, 8, 2 |
| Protons / electrons | 63 / 63 |
| State at 25 °C | solid |
| Melting point | 1099 K (825.9 °C, 1518.5 °F) |
| Boiling point | 1802 K (1528.8 °C, 2783.9 °F) |
| Density | 5.244 g/cm³ |
| Electronegativity (Pauling) | 1.2 |
| First ionization energy | 5.67 eV |
| Atomic radius | 231 pm |
| Discovered | 1901 |
# Electron configuration of europium
The electron configuration of europium is [Xe] 4f⁷ 6s², written out in full as 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f⁷ 5s² 5p⁶ 6s². Its 63 electrons fill 6 shells as 2, 8, 18, 25, 8, 2, so the outermost shell holds 2 electrons.
# Related elements
SmSamariumprevious elementGdGadoliniumnext elementLaLanthanumlanthanideCeCeriumlanthanidePrPraseodymiumlanthanideNdNeodymiumlanthanidePmPromethiumlanthanideTbTerbiumlanthanideDyDysprosiumlanthanideHoHolmiumlanthanide
# Europium FAQ
What is the atomic number of europium?
The atomic number of europium is 63: every europium atom has 63 protons in its nucleus. Its symbol is Eu.
What is the atomic mass of europium?
The standard atomic mass of europium is 151.96 u.
What is the electron configuration of europium?
Europium's electron configuration is [Xe] 4f⁷ 6s² (1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f⁷ 5s² 5p⁶ 6s²), with 2, 8, 18, 25, 8, 2 electrons per shell.
Is europium a metal?
Yes. Europium is a lanthanide, one of the metals.
What is the melting point of europium?
Europium melts at 1099 K (825.9 °C, 1518.5 °F) and boils at 1802 K (1528.8 °C, 2783.9 °F).
What is europium used for / known for?
Provides red and blue phosphors in screens and glows in the anti-counterfeiting marks on euro banknotes.