Periodic Table · element

Lawrencium

Lr · Z 103

atomic number

103

atomic mass

266

notation

Lr

group

3: Scandium

period

7

state0c

Solid

state20c

Unknown

occurrence

Synthetic

discovered

1961

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From the All Periodical Elements database in Notion, last edited 2026-08-13. This page is the row, rendered by the build; nothing on it is written by hand.