No He believed tiny particles were invisible and couldn't be changed....So No The person that believed in this was Dalton .
B . microscope
this is the answer .
I believe that the answer is B: H2O(s) because is the makeup of water also known as one hydrogen and two oxygen. So water as more entropy and the s stands for sol fore i think wich means it contains the most entropy.
Mg gained mass because it went from being a single element (on the reactant side) to being a molecule (on the product side).
