The diagram shows both a chemical change and a physical change. water
hydrogen + oxygen
gas
gas
liquid
Which statement is supported by the diagram? Choose the correct answer.
A. Compounds can have different properties than the elements that make up the compound.
B. Atoms of most elements become less stable when they bind to form compounds.
C. Compounds can most easily form between elements that have full outer energy levels.
D. Two elements will always combine in the same ratios when they react to form a compound.