In one unit of NaCl (sodium chloride), there are a total of 2 atoms. This is because NaCl is composed of one sodium (Na) atom and one chloride (Cl) atom.
To break it down:
- Sodium (Na): Each formula unit of NaCl contains one sodium atom.
- Chloride (Cl): Each formula unit also contains one chloride atom.
When you add these together, you have:
- 1 (Na) + 1 (Cl) = 2 atoms
Therefore, in conclusion, a single unit of sodium chloride holds a total of 2 atoms.