Dalton's atomic theory couldn't explain the concept about _?

Explanation

Option A: Isomers are compounds that have the same molecular formula but different structural arrangements or spatial orientations. Dalton's atomic theory could not explain the concept of isomers because it focused on the idea that atoms were indivisible and did not consider the possibility of different structural arrangements within molecules.Option B: Protons are positively charged subatomic particles found in the nucleus of an atom. Dalton's atomic theory did not account for the existence of protons. It proposed that atoms were indivisible and did not delve into the internal structure of atoms or their subatomic particles.Option C: Isotopes are atoms of the same element that have different numbers of neutrons, resulting in different atomic masses. Dalton's atomic theory did not explain the concept of isotopes since it assumed that all atoms of a given element had the same mass. The discovery of isotopes came later through advancements in technology and scientific research. Option D: The nucleus is the central part of an atom that contains protons and neutrons. Dalton's atomic theory did not account for the presence of a nucleus. It proposed that atoms were indivisible and did not address the existence or structure of a central nucleus within the atom. The discovery of the atomic nucleus came later with the experiments of scientists such as Ernest Rutherford. But according to PTB, Dalton could only not explain the concept of isotopes. He had no link with isomers, protons and nucleus.