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Holmium (Ho)
Element with atomic number 67, category: Lanthanide, a solid at room temperature.
Element 67 of 118
Lanthanide
Holmium
Group 13, Period 6 (lanthanide series)
Common Uses
Medical lasers
Electron Diagram
About Holmium
Holmium is a chemical element with the symbol Ho and atomic number 67, meaning every atom has 67 protons in its nucleus. It is classed as Lanthanide and is a solid at room temperature. Its atomic mass is about 164.930 atomic mass units (u).
On the periodic table, Holmium sits in group 13, period 6 (lanthanide series), which determines how many electron shells it has and how it tends to react with other elements.
Uses of Holmium
In daily life and industry, Holmium is used for Medical lasers. These uses are closely tied to the typical properties of elements in the Lanthanide category.
Electron Structure of Holmium
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), Holmium has 5 electron shells, with an approximate arrangement of 2, 8, 18, 32, 7 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.