- Sodium is a kind of element
- Chlorine is a kind of element
- Therefore, 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
- So, sodium chloride is a kind of chemical compound

Therefore, sodium chloride is a kind of chemical compound
Question
Which is a chemical compound?

Context
- Sodium is a kind of element 
- A compound is made of two or more elements chemically combined 
- Sodium chloride is always made of chemically combined chlorine and sodium 
- Chlorine is a kind of element