Which scientist proposed that atoms of different elements have different properties?

• A. Dmitri Mendeleev
• B. Ernest Rutherford
• C. John Dalton
• D. J.J. Thomson

Answer: (C)

Verified step by step guidance

1. Understand the historical context of atomic theory development in chemistry.
2. Recall that John Dalton proposed the atomic theory which states that atoms of different elements have different properties, including different masses and characteristics.
3. Recognize that Dmitri Mendeleev is known for creating the periodic table, organizing elements by their properties but not proposing the atomic theory itself.
4. Note that Ernest Rutherford is famous for the nuclear model of the atom, discovering the nucleus, but not for differentiating atoms by their properties in the way Dalton did.
5. Remember that J.J. Thomson discovered the electron and proposed the plum pudding model, which does not address the uniqueness of atoms of different elements.