Which of the following statements is part of Dalton's atomic theory?

• A. Atoms of different elements are identical in mass and properties.
• B. Atoms can be created or destroyed in chemical reactions.
• C. All matter is composed of indivisible atoms.
• D. Atoms are made up of protons, neutrons, and electrons.

Answer: (C)

Verified step by step guidance

1. Recall that Dalton's atomic theory was one of the earliest models to describe the nature of atoms and matter.
2. Identify the key postulates of Dalton's atomic theory, which include: all matter is composed of indivisible atoms, atoms of the same element are identical, atoms of different elements differ in mass and properties, and atoms cannot be created or destroyed in chemical reactions.
3. Compare each given statement with Dalton's postulates: the statement 'All matter is composed of indivisible atoms' aligns with Dalton's theory.
4. Note that the statement 'Atoms of different elements are identical in mass and properties' contradicts Dalton's theory, which says atoms of different elements differ in mass and properties.
5. Recognize that the ideas about atoms being made up of protons, neutrons, and electrons came after Dalton's time and are not part of his atomic theory.