Final answer:
The name for the formula for the covalent compound chlorine trifluoride is Cl₃F. The option (D) is correct.
Step-by-step explanation:
The name for the formula for the covalent compound chlorine trifluoride is Cl₃F. When naming covalent compounds, the first element is given its elemental name. The second element receives an -ide ending.
The numerical prefix is used to indicate the number of atoms of each element present in the compound. In this case, chlorine is the first element and it has three atoms, so it is written as Cl₃. Fluorine is the second element and it has one atom, so it is written as F.