Question

sep use models chlorine and oxygen form many different compounds, including clo₂ and cl₂o₃. how do the names of these compounds differentiate one chlorine oxide from another?

Explanation:

In naming binary molecular compounds (like these chlorine - oxygen compounds), prefixes are used to indicate the number of each type of atom. For \(ClO_2\), the prefix "mono -" is often omitted for the first element (chlorine in this case when there is one atom of the first element, although it's a bit of a special case in naming rules). The prefix "di -" is used for the two oxygen atoms, so it's named chlorine dioxide. For \(Cl_2O_3\), the prefix "di -" is used for the two chlorine atoms and "tri -" is used for the three oxygen atoms, so it's named dichlorine trioxide. The prefixes in their names show the ratio of chlorine to oxygen atoms.

Answer:

The names use prefixes to show the number of each type of atom. \(ClO_2\) is chlorine dioxide (implied one chlorine, two oxygens) and \(Cl_2O_3\) is dichlorine trioxide (two chlorines, three oxygens).