Answer:
2. sodium flouride is the correct answer.
Step-by-step explanation:
The name for the compound with the formula NaF is sodium flouride.
sodium flouride is an excellent source of fluoride ion and it used fo many purposes.
- Sodium fluoride is a colorless inorganic salt.
- sodium fluoride is soluble in water.
uses of sodium fluoride
- It is used to cure dental cavities.
- It used in the metallurgy.
- It is used as a cleaning agent and as an insecticide.