The chemical formula for glucose is C6H12O6, and the symbol for hydrogen is H. Glucose is the product of photosynthesis and is a simple sugar. Hydrogen is a gas used as a fuel. Based on the information above, describe the similarities and differences between these two substances in regards to elements and compounds.

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.