Lawrencium
103
Lr
Group
n/a
Period
7
Block
d
Protons
Electrons
Neutrons
103
103
159
General Properties
Atomic Number
103
Atomic Weight
[262]
Mass Number
262
Category
Actinides
Color
n/a
Radioactive
Yes
Named after Ernest O. Lawrence, inventor of the cyclotron
Crystal Structure
n/a
History
Lawrencium was discovered by Albert Ghiorso, Torbjørn Sikkeland, Almon Larsh and Robert M. Latimer in 1961 at the University of California, Berkeley.
It was produced by the bombardment of californium with boron atoms.
Lawrencium was the last member of the actinide series to be discovered.
It was produced by the bombardment of californium with boron atoms.
Lawrencium was the last member of the actinide series to be discovered.
Electrons per shell
2, 8, 18, 32, 32, 8, 3
Electron Configuration
[Rn] 5f14 7s2 7p1
Lawrencium is a trivalent ion in aqueous solution
Physical Properties
Phase
Solid
Density
-
Melting Point
1900 K | 1626.85 °C | 2960.33 °F
Boiling Point
-
Heat of Fusion
n/a
Heat of Vaporization
n/a
Specific Heat Capacity
-
Abundance in Earth's crust
n/a
Abundance in Universe
n/a
CAS Number
22537-19-5
PubChem CID Number
n/a
Atomic Properties
Atomic Radius
-
Covalent Radius
-
Electronegativity
1.3 (Pauling scale)
Ionization Potential
4.9 eV
Atomic Volume
-
Thermal Conductivity
0.1 W/cm·K
Oxidation States
3
Applications
Lawrencium is used for scientific research purposes only.
Lawrencium is harmful due to its radioactivity
Isotopes
Stable Isotopes
-Unstable Isotopes
251Lr, 252Lr, 253Lr, 254Lr, 255Lr, 256Lr, 257Lr, 258Lr, 259Lr, 260Lr, 261Lr, 262Lr, 263Lr, 264Lr, 265Lr, 266Lr