Lawrencium

Lawrencium is a synthetic chemical element with symbol Lr and atomic number 103. It is named in honor of Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements.

Atomic Weight:  6576
Density:        67.6 g/cm3
Melting Point:  45 °C
 Boiling Point: 56 °C