Question

Which is not part of John Dalton’s atomic theory?

Atoms of different elements have different masses.

All atoms of the same element have the same mass.

Atoms are made up of smaller particles.

All elements are composed of atoms.

Answer 1

C- Atoms are made up of smaller particles ~ I hope it’s correct

Answer 2

The correct answer is C. Atoms are made up of smaller particles.

Step-by-step explanation:

John Dalton was an English chemist and physicist mainly known for proposing one of the first formal theories related to atoms by the end of the 19th century. In this theory, Dalton explained atoms were the basic unit for all elements and cannot be divided into smaller participles, also he proposed atoms of the same elements are identical including their masses and those of different elements are different. This means the statement that is not part of Dalton's atomic theory is "Atoms are made up of smaller particles" because for Dalton atoms are the smallest unit and cannot be divided into smaller parts, this was proved as false later as they can be divided into sub-particles.