To construct a statement that supports the argument that the chemical equation \( H_2 + O_2 \rightarrow 2H_2O \) violates the law of conservation of matter, you can use the dropdown selections as follows:
"There are more O atoms on the right side of the arrow than on the left."
This statement highlights that the number of atoms of oxygen does not match on both sides of the equation, which conflicts with the principle that matter cannot be created or destroyed in a chemical reaction.