The reactants in the chemical reaction of photosynthesis are carbon dioxide (CO₂) and water (H₂O).

Here's a simplified breakdown of the process:

* Carbon dioxide is absorbed from the atmosphere by plants through tiny pores called stomata on their leaves.

* Water is absorbed from the soil through the roots.

These reactants are then combined in the presence of sunlight and chlorophyll (a green pigment found in plants), resulting in the production of glucose (C₆H₁₂O₆), a type of sugar that provides energy for the plant, and oxygen (O₂) , which is released back into the atmosphere.

The chemical equation for photosynthesis is:

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂