# atomic number 11
## Noun (N)
### Sense: a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)
- ธาตุโซเดียม
- เลขอะตอม 11
- โซเดียม