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Periodic table · chemistry · physics
Element story

Bromine

Atomic number 35 means that every Bromine nucleus contains 35 protons. That proton count is the element's identity: change it and you no longer have Bromine.

Start with the nucleus

Atomic number 35 means that every Bromine nucleus contains 35 protons. That proton count is the element's identity: change it and you no longer have Bromine.

Bromine (Br) is chemical element 35. It belongs to the halogens, and its reference state at room temperature is a liquid. Those basic facts are a useful starting point for its chemistry and applications.

In practice, it turns up most often in flame retardants, photography and chemical synthesis.

See the atom

Conceptual visual: electron shells are a learning aid, not a literal picture of quantum orbitals.

What this number means

Atomic number 35 means that every Bromine nucleus contains 35 protons. That proton count is the element's identity: change it and you no longer have Bromine.

Keep exploring

→ Bromine · Atomic structure · Periodic trends

35BrBromine
Bromine · Br · Z = 35

Bromine (Br) is chemical element 35. It belongs to the halogens, and its reference state at room temperature is a liquid. Those basic facts are a useful starting point for its chemistry and applications.

Understanding the element

Bromine (Br) is chemical element 35. It belongs to the halogens, and its reference state at room temperature is a liquid. Those basic facts are a useful starting point for its chemistry and applications.

Where do we encounter it?

In practice, it turns up most often in flame retardants, photography and chemical synthesis.

What its position in the table tells us

Bromine sits in period 4, group 17 and the P block. That location is useful because neighbouring elements often share trends in valence electrons, oxidation states and bonding behaviour.