Lawrencium (Lr), element 103 – Learn Acer periodic table

Lawrencium is a synthetic chemical element with chemical symbol Lr (formerly Lw) 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. A radioactive metal, lawrencium is the eleventh transuranic element and is also the final member of the actinide series.

Symbol Lr. Atomic mass 266.0 u. Group 3, period 7. Electron configuration [Rn] 5f14 7s2 7p1. Electrons per shell 2, 8, 18, 32, 32, 8, 3. State at room temperature: Solid. Melting point 1626.8 °C, boiling point unknown. Discovered by Lawrence Berkeley National Laboratory.

Element data from Wikipedia, CC BY-SA 3.0.

Lawrencium (Lr), element 103 – Learn Acer periodic table

Lawrencium

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