To solve the problem of identifying the odd one out from the given options, we should consider the properties or categories that these items belong to.
Options provided are:
- Copper
- Iron
- Aluminium
- Bromine
Let's analyze each option:
- Copper: A metal, specifically a transition metal known for its electrical conductivity.
- Iron: Another metal, known for its magnetic properties and is a transition metal.
- Aluminium: A metal, yet not a transition metal, but commonly used for its lightweight and anticorrosive properties.
- Bromine: A non-metal, distinctive for being a liquid at room temperature and belonging to the halogen group.
The first three options (Copper, Iron, Aluminium) are metals, while Bromine is a non-metal. This categorically distinguishes Bromine from the others.
Therefore, the odd one out is Bromine.