Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Chemical class | Group | Formula | Prefix | Suffix | Example |
| --- | --- | --- | --- | --- | --- |
| haloalkane | halo | RX | halo- | alkyl halide | Chloroethane (Ethyl chloride) |
| fluoroalkane | fluoro | RF | fluoro- | alkyl fluoride | Fluoromethane (Methyl fluoride) |
| chloroalkane | chloro | RCl | chloro- | alkyl chloride | Chloromethane (Methyl chloride) |
| bromoalkane | bromo | RBr | bromo- | alkyl bromide | Bromomethane (Methyl bromide) |
| iodoalkane | iodo | RI | iodo- | alkyl iodide | Iodomethane (Methyl iodide) |
Question:
Which example has rx as the formula?
Answer:
Chloroethane (Ethyl chloride)