What is the compound name for BrO₂?
The Correct Answer and Explanation is:
The compound name for ( \text{BrO}_2 ) is bromine dioxide.
Explanation
To understand the naming of ( \text{BrO}_2 ), we need to consider the components of the compound and the rules of chemical nomenclature. The formula ( \text{BrO}_2 ) consists of two elements: bromine (Br) and oxygen (O). Bromine is a halogen, and it is found in Group 17 of the periodic table. Oxygen is a chalcogen, located in Group 16.
When naming molecular compounds, we follow specific conventions based on the elements involved. The first part of the name is derived from the first element in the formula, which in this case is bromine. Since it is the first element, its name is retained in the compound name.
The second part of the name is based on the second element, oxygen. When oxygen is present in a compound, it typically takes on the suffix “-ide” if it is in a binary compound (composed of only two different elements). Thus, the name of oxygen becomes “oxide.”
In addition to the names of the elements, we must consider the number of atoms of each element present in the compound, which is indicated by prefixes. In ( \text{BrO}_2 ), there are two oxygen atoms. The prefix used for two is “di-.” Therefore, we combine this prefix with the name “oxide,” resulting in “dioxide.”
Putting it all together, we name the compound ( \text{BrO}_2 ) as bromine dioxide. This nomenclature accurately reflects both the elements in the compound and the number of oxygen atoms present. It is also important to note that in a compound like ( \text{BrO}_2 ), bromine exhibits a +4 oxidation state, while each oxygen is in the -2 oxidation state. This understanding of oxidation states can be essential when considering the chemical behavior of the compound in reactions and its potential uses in various applications.