Question

Whose model of the atom did J.J. Thomson prove to be incorrect with his Cathode-Ray tube experiments?

Answer 1

Answer:

John Dalton

Explanation:

J.J. Thompson’s cathode ray experiment proved that Dalton’s atomic theory was incorrect,  

Dalton proposed that atoms are indivisible and they are the smallest part of a substance. But Thompson’s cathode ray experiment showed that atoms are made up of negatively charged particles. Option B is correct.

Option A is incorrect. Neils Bohr gave the atomic model after J.J. Thompson and he explained the quantization of electron energy.  

Option C is incorrect. Erwin Schrodinger proposed that electrons move in electron clouds, electrons do not have a definite position and there is a probability of finding electron in space.

Option D is incorrect. James Chadwick discovered the neutron.

Answer 2

JJ Thomson proved John Dalton's theory wrong, as Thomson discovered the electron. This showed that there were particles that were smaller than an atom, despite Dalton claiming that the atom is the smallest unit of matter.