Select each correct answer. More than one answer may be correct. British scientist John Dalton is best known for his atomic theory. Which of the following ideas is part of Dalton's theory? A. All matter is made up of atoms, which cannot be destroyed or broken down. B. Atoms of different elements are unique and can combine to form compounds. C. Chemical reactions occur when atoms are rearranged. D. All atoms of a given element are identical.