Lawrencium at Chemical Elements.com 

 

Basic Information


Name: Lawrencium
Symbol: Lr
Atomic Number: 103
Atomic Mass: (262.0) amu
Melting Point: Unknown
Boiling Point: Unknown
Number of Protons/Electrons: 103
Number of Neutrons: 159
Classification: Rare Earth
Crystal Structure: Unknown
Density @ 293 K: Unknown
Color: Unknown


Atomic Structure

[Bohr Model of Lawrencium]  
Number of Energy Levels: 7

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 32
    Sixth Energy Level: 9
    Seventh Energy Level: 2

Isotopes

Isotope Half Life
Lr-254 13.0 seconds

Facts


Date of Discovery: 1961
Discoverer: Albert Ghiorso
Name Origin: After Ernest Lawrence
Uses: No uses known
Obtained From: Man-made