Sodium atoms replace chlorine atoms. Sodium and chlorine atoms mix together. Sodium atoms dissolve in chlorine atoms. Sodium and chlorine atoms bond chemically.
I gave my students this multiple choice question: When table salt (NaCl) is produced, which of the following best describes the actions of the sodium (Na) and chlorine (Cl) atoms?

Only one answer is correct among these 4 choices:
- Sodium atoms replace chlorine atoms.
- Sodium and chlorine atoms mix together.
- Sodium atoms dissolve in chlorine atoms.
- Sodium and chlorine atoms bond chemically.

Could you tell me which one is correct?

Sodium and chlorine atoms bond chemically.