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Terbium (Tb)
Element with atomic number 65, category: Lanthanide, a solid at room temperature.
Element 65 of 118
Lanthanide
Terbium
Group 11, Period 6 (lanthanide series)
Common Uses
Green lamps
Electron Diagram
About Terbium
Terbium is a chemical element with the symbol Tb and atomic number 65, meaning every atom has 65 protons in its nucleus. It is classed as Lanthanide and is a solid at room temperature. Its atomic mass is about 158.925 atomic mass units (u).
On the periodic table, Terbium sits in group 11, period 6 (lanthanide series), which determines how many electron shells it has and how it tends to react with other elements.
Uses of Terbium
In daily life and industry, Terbium is used for Green lamps. These uses are closely tied to the typical properties of elements in the Lanthanide category.
Electron Structure of Terbium
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), Terbium has 5 electron shells, with an approximate arrangement of 2, 8, 18, 32, 5 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.