Which of the following were concepts in Dalton's Theory? (You may select as many answers as you think are necessary.) A All atoms of a given element are identical. B Compounds can be broken down into specific elements with different properties. C All matter is composed of indivisible particles. D Chemical reactions involve combinations of atoms, not destruction of atoms. E Substances with the same pressure, volume, and temperature will have the same number of particles. F Elements react to form whole number ratios.