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Lawrencium (Lr)
Element with atomic number 103, category: Actinide, a solid at room temperature.
Element 103 of 118
Actinide
Lawrencium
Group 17, Period 7 (actinide series)
Common Uses
Research
Electron Diagram
About Lawrencium
Lawrencium is a chemical element with the symbol Lr and atomic number 103, meaning every atom has 103 protons in its nucleus. It is classed as Actinide and is a solid at room temperature. Its atomic mass is about 266 atomic mass units (u).
On the periodic table, Lawrencium sits in group 17, period 7 (actinide series), which determines how many electron shells it has and how it tends to react with other elements.
Uses of Lawrencium
In daily life and industry, Lawrencium is used for Research. These uses are closely tied to the typical properties of elements in the Actinide category.
Electron Structure of Lawrencium
Using a simplified electron shell model (at most 2 electrons in the first shell, 8 in the second, 18 in the third, and so on), Lawrencium has 6 electron shells, with an approximate arrangement of 2, 8, 18, 32, 32, 11 electrons from the innermost shell to the outermost. This is a simplified learning model, not the full electron configuration that accounts for the s, p, d and f subshells.
Explore Other Elements
Want to see another element or try the element symbol quiz? Go back to the Interactive Periodic Table to explore all 118 chemical elements.