- Chemical reactions do not cause the total number of atoms to change
- Photosynthesis is a kind of chemical reaction
- So, the total number of atoms stay the same in chemical reaction

- The total number of atoms stay the same in chemical reaction
- Photosynthesis is a kind of chemical reaction
- So, the total number of atoms stay the same in photosynthesis

- The total number of atoms stay the same in photosynthesis
- 6 atoms of carbon involves in photosynthesis
- Carbon is a kind of atom
- So, the number of carbon atoms stays at 6 in photosynthesis

Hence, the number of carbon atoms stays at 6 in photosynthesis
Question
If a chemical reaction such as photosynthesis begins with 6 atoms of carbon [C], how many atoms of carbon [C] should be in the products?

Context
- Chemical reactions do not cause the total number of atoms to change 
- 6 atoms of carbon involves in photosynthesis 
- Photosynthesis is a kind of chemical reaction 
- Carbon is a kind of atom