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:
| Coefficient | Parts-per example | Uno equiv. | Symbol form | Value of quantity |
| --- | --- | --- | --- | --- |
| 10 −2 | 2% | 2 centiuno | 2 cU | 2×10 −2 |
| 10 −3 | 2 ‰ | 2 milliuno | 2 mU | 2×10 −3 |
| 10 −6 | 2 ppm | 2 microuno | 2 µU | 2×10 −6 |
| 10 −9 | 2 ppb | 2 nanouno | 2 nU | 2×10 −9 |
| 10 −12 | 2 ppt | 2 picouno | 2 pU | 2×10 −12 |
Question:
What is the Parts-per example of 2×10 −6?
Answer:
2 ppm