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Bromine (Br)
Element with atomic number 35, category: Halogen, a liquid at room temperature.
Element 35 of 118
Halogen
Bromine
Group 17, Period 4
Common Uses
Flame retardants
Electron Diagram
About Bromine
Bromine is a chemical element with the symbol Br and atomic number 35, meaning every atom has 35 protons in its nucleus. It is classed as Halogen and is a liquid at room temperature. Its atomic mass is about 79.904 atomic mass units (u).
On the periodic table, Bromine sits in group 17, period 4, which determines how many electron shells it has and how it tends to react with other elements.
Uses of Bromine
In daily life and industry, Bromine is used for Flame retardants. These uses are closely tied to the typical properties of elements in the Halogen category.
Electron Structure of Bromine
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), Bromine has 4 electron shells, with an approximate arrangement of 2, 8, 18, 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.