Timeline of chemical element discoveries Modern discoveries Modern discoveries

| Z | Element_ | Observed_or_predicted | Isolated_widely_known | Observer | First_isolator | Notes_ |
|---|---|---|---|---|---|---|
| 15 | Phosphorus | 1669 | 1669 | H. Brand | H. Brand | Prepared from urine, it was the first element to be chemically discovered. |
| 27 | Cobalt | 1732 |  | G. Brandt |  | Proved that the blue color of glass is due to a new kind of metal and not bismuth as thought previously. |