Atomic Number
63
Element 63
Europium (Eu)
Europium is a chemical element with symbol Eu and atomic number 63. It is a moderately hard, silvery metal which readily oxidizes in air and water.
Atomic Mass
151.96 u
Category
Lanthanide
Period
6
Group
Lanthanide series
Phase
solid
Density
5.24 g/cm3
Electron Shells
2, 8, 18, 25, 8, 2
Atomic Structure
Protons: 63. Electrons: 63. Neutrons: Varies by isotope.
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f⁷
Why Europium Matters
Europium helps connect atomic number 63, lanthanide behavior, period 6 trends, and electron shell structure. Its solid phase, atomic mass of 151.96 u, and electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f⁷ make it useful for comparing bonding patterns across the periodic table.
Discovery and Occurrence
Europium was discovered 1901 by Eugène-Anatole Demarçay. Europium is a chemical element with symbol Eu and atomic number 63. It is a moderately hard, silvery metal which readily oxidizes in air and water.
Safety and Handling Context
Europium is presented here for learning and comparison. Pure elements and laboratory compounds can have hazards that depend on dose, form, and setting.
Related Elements
Frequently Asked Questions
- What is the atomic number of Europium?
- Europium has atomic number 63, which means a neutral atom has 63 protons and 63 electrons.
- What is the chemical symbol for Europium?
- The chemical symbol for Europium is Eu.
- What category is Europium in?
- Europium is classified as a lanthanide and sits in period 6 of the periodic table.
Explore Europium in 3D
Use the interactive table above to rotate atomic models, compare periodic trends, and move from Europium to neighboring elements without losing your place.