Which scientist described atoms as small, indivisible spheres that could not be divided into anything smaller?

• A. J.J. Thomson
• B. Ernest Rutherford
• C. John Dalton
• D. Niels Bohr

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 first modern atomic theory, describing atoms as small, indivisible spheres that could not be divided into anything smaller.
3. Recognize that J.J. Thomson discovered the electron and proposed the plum pudding model, which suggested atoms had internal structure.
4. Know that Ernest Rutherford discovered the nucleus, showing atoms are mostly empty space with a dense center.
5. Remember that Niels Bohr developed the model of the atom with electrons orbiting the nucleus in quantized energy levels.