Respuesta :
Atoms of a given element can have different numbers of neutrons.
Nuclear reactions can change an atom of one element into an atom of another element.
Atoms contain smaller particles: protons, neutrons, and electrons.
Dalton's atomic theory was proposed by John Dalton in 1803. It states that elements are made up of indivisible atoms, atoms of the same element are identical, and atoms cannot be created or destroyed.
Based on the postulates of Dalton's atomic theory, the statements that contradict the theory are:
- Atoms of a given element can have different numbers of neutrons.
- Nuclear reactions can change an atom of one element into an atom of another element.
- Atoms contain smaller particles: protons, neutrons, and electrons.
Dalton's atomic theory states that all the atoms of an element are identical, atoms are indivisible and indestructible, and all matter is composed of atoms.
The statements that contradict Dalton's postulates are:
- Atoms are divisible into sub-atomic particles, known as protons, neutrons, and electrons.
- Nuclear reactions cannot change an atom of one element into an atom of another element. The theory does not describe the structure of the atom and is one of the major drawbacks.
- The number of neutrons in the different elements differ, for example, nitrogen has 14 and boron has 6 neutrons.
Therefore, dalton's atomic theory has some drawbacks, which failed to explain the structure of the atom, the chemical reactions, and the smaller units of the atom.
To know more about Dalton's atomic theory, refer to the following link:
https://brainly.com/question/14865458
