What parts of Dalton’s atomic theory no longer agree with the current picture of the atom?
Among other things, Dalton theorized that atoms were the indivisible and indestructible building blocks of matter and while they are still considered to be the smallest unit of “ordinary” matter (that still retains the properties of chemical elements, as opposed to having quantum properties), they CAN be indivisible and broken down into smaller “building blocks” per say. Each atom is made up of protons, electrons, and neutrons. He also theorized that the atoms of a given element are identical to one another. This has been proved to be false through the understanding of isotopes. For example C-14 and C-12 are the same element, carbon, but the make up of their atoms are not identical, C-14 has more neutrons.
