What are some facts of rectants and example fast i need it

H2 (hydrogen gas) and O2 (oxygen gas) are reactants in the reaction that forms liquid water: 2 H2(g) + O2(g) → 2 H2O(l).

Explanation:

Notice mass is conserved in this equation. There are four atoms of hydrogen in both the reactant and product side of the equation and two atoms of oxygen.

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

answerscientific theory;