Europium at Chemical Elements.com 


 

Basic Information


Name: Europium
Symbol: Eu
Atomic Number: 63
Atomic Mass: 151.964 amu
Melting Point: 822.0 °C (1095.15 °K, 1511.6 °F)
Boiling Point: 1597.0 °C (1870.15 °K, 2906.6 °F)
Number of Protons/Electrons: 63
Number of Neutrons: 89
Classification: Rare Earth
Crystal Structure: Cubic
Density @ 293 K: 5.259 g/cm3
Color: silver


Atomic Structure

[Bohr Model of Europium]  
Number of Energy Levels: 6

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 25
    Fifth Energy Level: 8
    Sixth Energy Level: 2

Isotopes

Isotope Half Life
Eu-147 24.4 days
Eu-148 54.5 days
Eu-149 93.1 days
Eu-150 36.0 years
Eu-151 Stable
Eu-152 13.5 years
Eu-152m 9.3 hours
Eu-153 Stable
Eu-154 8.6 years
Eu-155 7.4 years
Eu-156 15.2 days

Facts


Date of Discovery: 1901
Discoverer: Eugene Demarcay
Name Origin: Europe
Uses: color televisions
Obtained From: Man-made