1. All matter is composed of atoms, which are indivisible and indestructible particles. This is the foundation of his theory.
2. Atoms of the same element are identical in size, mass, and other properties. This means that all carbon atoms, for example, are exactly alike.
3. Atoms of different elements are different in size, mass, and other properties. This explains why different elements have different chemical properties.
4. Atoms combine in simple whole-number ratios to form compounds. This explains the law of definite proportions, which states that a given compound always contains the same elements in the same proportions by mass.
5. Atoms are neither created nor destroyed in chemical reactions. This explains the law of conservation of mass, which states that the total mass of the reactants in a chemical reaction is equal to the total mass of the products.
While Dalton's atomic theory was a major breakthrough in understanding matter, it's important to note that some of his ideas have been modified or expanded upon based on later discoveries.
