# atomic number 15
## Noun (N)
### Sense: a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms
- ธาตุฟอสฟอรัส
- ฟอสฟอรัส
- เลขอะตอม 15