Sodium chloride does not exist as molecules but aggregates of oppositiceky charged ions. Why?
Answers
In case of sodium crystal each Na+ ion is surrounded by six Cl– ions and vice versa. It is difficult to identify that which Na+ ion belong to a given Cl– ion or which Cl–ion belong to a given Na+ion. So, we select a combination of Na+ and Cl–as a formula unit. The formula unit of an ionic compound is the simple collection of cations and anions which is electrically neutral. Formula unit does not exist as a separate entity. So due to this ionic compound like NaCl do not exist as discrete molecule in the crystal lattice but exist as aggregates of a very large number of oppositely charged ions.
Answer:
Due to ionic compound but compound NaCl do not exist as discrete molecules in the crystal lattice but exist as aggregate of a very large number of opposite charged ion
Explanation:
- Na + ion is a alkali metal group , which releasing electron
- Cl- ion is the anion where it gains electron
- Where Na+ ion is surrounded by sic Cl- ion .
- It is difficult to identify that which Na + ion belong to a give Na+ ion
- so we related a combination of the Na and cl are formula unit