# atomic number 33
## Noun (N)
### Sense: a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
- ธาตุอาร์ซีนิก
- สารหนู
- เลขอะตอม 33