- Chlorine is a kind of element
- Sodium is a kind of element
- Hence, sodium and chlorine are two elements

- Sodium and chlorine are two elements
- Sodium chloride is always made of chemically combined chlorine and sodium
- So, sodium chloride is made of two elements chemically combined

- Sodium chloride is made of two elements chemically combined
- A compound is made of two or more elements chemically combined
- Therefore, sodium chloride is a compound

- Sodium chloride is a compound
- Sodium and chlorine reacting forms sodium chloride
- Hence, sodium and chlorine reacting forms a compound

Hence, sodium and chlorine reacting forms a compound
What is formed when a sodium atom and chlorine atom react chemically?
- Chlorine is a kind of element 
- Sodium and chlorine reacting forms sodium chloride 
- A compound is made of two or more elements chemically combined 
- Sodium chloride is always made of chemically combined chlorine and sodium 
- Sodium is a kind of element